diff --git a/pandoc/collect_links.lua b/pandoc/collect_links.lua
index 22e507d..5b692fd 100644
--- a/pandoc/collect_links.lua
+++ b/pandoc/collect_links.lua
@@ -11,6 +11,7 @@ local data = f:read("a")
 f:close()
 local visited = {}
 read(data):walk({ Link = function (link)
+  if not link.target:find(".%.md$") then return end
   local f = io.open(link.target)
   if f == nil then return else f:close() end
   if visited[link.target] then return end
diff --git a/pandoc/collect_notes.lua b/pandoc/collect_notes.lua
index c00e373..a7c670b 100644
--- a/pandoc/collect_notes.lua
+++ b/pandoc/collect_notes.lua
@@ -12,6 +12,7 @@ local function collect (fp)
   local data = f:read("a")
   f:close()
   read(data):walk({ Link = function (link)
+    if not link.target:find(".%.md$") then return end
     local f = io.open(link.target)
     if f == nil then return else f:close() end
     if visited[link.target] then return end
diff --git a/pandoc/defaults/bavbavhaus.net.yaml b/pandoc/defaults/bavbavhaus.net.yaml
index d07c5d1..0a73554 100644
--- a/pandoc/defaults/bavbavhaus.net.yaml
+++ b/pandoc/defaults/bavbavhaus.net.yaml
@@ -1,8 +1,12 @@
 ---
 from: markdown
+toc: true
+citeproc: true
+csl: chicago-fullnote-sl
 filters:
-  - insert_bodypart.lua
-  - insert_linkparts.lua
+  - localize_quotes.lua
+  - update_internal_targets.lua
+  - insert_parts.lua
 template: bavbavhaus.net.html5
 to: html
 ...
diff --git a/pandoc/filters/insert_bodypart.lua b/pandoc/filters/insert_bodypart.lua
deleted file mode 100644
index 6316cdf..0000000
--- a/pandoc/filters/insert_bodypart.lua
+++ /dev/null
@@ -1,16 +0,0 @@
-local RawBlock = pandoc.RawBlock
-
-SCRIPT_NAME = "insert_bodypart.lua"
-os.setlocale("C")
-
-return {
-  { Meta = function (meta)
-    if not meta["bodypart"] then return end
-    local fp = meta["bodypart"]
-    local f = assert(io.open(fp), "\n" ..
-      "[ERROR] could not open " .. fp .. " for reading.")
-    meta["bodypart"] = RawBlock("html5", f:read("a"))
-    f:close()
-    return meta
-  end }
-}
diff --git a/pandoc/filters/insert_linkparts.lua b/pandoc/filters/insert_parts.lua
similarity index 67%
rename from pandoc/filters/insert_linkparts.lua
rename to pandoc/filters/insert_parts.lua
index e50583d..9ead744 100644
--- a/pandoc/filters/insert_linkparts.lua
+++ b/pandoc/filters/insert_parts.lua
@@ -7,18 +7,18 @@ os.setlocale("C")
 
 return {
   { Meta = function (meta)
-    if not meta["linkparts"] then return end
-    if type(meta["linkparts"]) == "string" then
-      meta["linkparts"] = { meta["linkparts"] }
+    if not meta["parts"] then return end
+    if type(meta["parts"]) == "string" then
+      meta["parts"] = { meta["parts"] }
     end
     local links = MetaList({})
-    for _,fp in ipairs(meta["linkparts"]) do
+    for _,fp in ipairs(meta["parts"]) do
       local f = assert(io.open(fp), "\n" ..
         "[ERROR] could not open " .. fp .. " for reading.")
       links:insert(RawBlock("html5", f:read("a")))
       f:close()
     end
-    meta["linkparts"] = links
+    meta["parts"] = links
     return meta
   end }
 }
diff --git a/pandoc/sitemap.lua b/pandoc/sitemap.lua
index d870296..1870988 100644
--- a/pandoc/sitemap.lua
+++ b/pandoc/sitemap.lua
@@ -1,44 +1,46 @@
-local l = require("pandoc.logging")
+-- local l = require("pandoc.logging")
 local read = pandoc.read
 
 assert(#arg == 2, "\n" ..
   "[ERROR] usage: pandoc lua sitemap.lua <index file> <output file>")
+local index_file, output_file = table.unpack(arg)
 
-local node_list = {}
-local graph_map = {}
+local node_list, node_map = {}, {}
 local function collect (fp)
   local f = assert(io.open(fp), "\n" ..
     "[ERROR] could not open " .. fp .. " for reading.")
   table.insert(node_list, fp)
-  graph_map[fp] = { order = #node_list, nodes = {} }
+  node_map[fp] = { order = #node_list, nodes = {} }
   local data = f:read("a")
   f:close()
   local visited = {}
   read(data):walk({ Link = function (link)
+    if not link.target:find(".%.md$") then return end
     local f = io.open(link.target)
     if f == nil then return else f:close() end
     if visited[link.target] then return end
     visited[link.target] = true
-    table.insert(graph_map[fp]["nodes"], link.target)
-    if not graph_map[link.target] then collect(link.target) end
+    table.insert(node_map[fp]["nodes"], link.target)
+    if not node_map[link.target] then collect(link.target) end
   end })
 end
-
-collect(arg[1])
+collect(index_file)
 
 local L = {
-  SW = ".", L = "<", W = "-", NW = ".",
-  S  = "|",          X = " ", N  = "|",
-  SE = "'", R = ">", E = "-", NE = "'",
+  L = "<", 
+  R = ">", 
+  NW = ",", N = "-", NE = ".",
+  W  = "|", X = " ", E  = "|",
+  SW = "'", S = "-", SE = "'",
 }
 
-local layout = {}
-local r_wing = {}
-local l_wing = {}
+local arma = {}
+local list = {}
+local armb = {}
 for i,node in ipairs(node_list) do
-  r_wing[i] = {}
-  layout[i] = node
-  l_wing[i] = {}
+  arma[i] = {}
+  list[i] = node
+  armb[i] = {}
 end
 
 local function reverse (t)
@@ -53,7 +55,7 @@ local function find_free_col(wing, a, b)
   while true do
     for i=a,b do
       local cell = wing[i][col]
-      if cell ~= nil and cell ~= L["X"] then
+      if cell ~= nil and cell ~= L.X then
         goto continue
       end
     end
@@ -65,80 +67,98 @@ local function find_free_col(wing, a, b)
 end
 
 for _,node in ipairs(node_list) do
-  local a_node = graph_map[node]
+  local a_node = node_map[node]
   for _,node in ipairs(a_node["nodes"]) do
     local a = a_node["order"]
-    local b = graph_map[node]["order"]
+    local b = node_map[node]["order"]
 
     local i1 = 1
     local ia = math.min(a,b)
     local ib = math.max(a,b)
     local iz = #node_list
-    local wing = a < b and r_wing or l_wing
-    local r_first, l_first = true, true
-    local first = a < b and r_first or l_first
+    local wing = a < b and arma or armb
 
-    local col = find_free_col(wing, ia, ib)
+    local col = 1
+    while true do
+      for i=ia,ib do
+        local cell = wing[i][col]
+        if cell ~= nil and cell ~= L.X then
+          goto continue
+        end
+      end
+      break
+      ::continue::
+      col = col + 1
+    end
     if col == 1 then col = 2 end
     local a_row = wing[ia]
-    if a_row[1] == nil or a_row[1] == " " then
-      a_row[1] = a < b and "-" or "<"
+    if a_row[1] == nil or a_row[1] == L.X then
+      a_row[1] = a < b and L.N or L.L
     end
     for i=1,col-1 do
-      if a_row[i] == nil or a_row[i] == L["X"] then a_row[i] = "-" end
+      if a_row[i] == nil or a_row[i] == L.X then a_row[i] = L.N end
     end
-    a_row[col] = "."
+    a_row[col] = a < b and L.NW or L.NE
     for i=ia+1,ib-1 do
       for j=1,col-1 do
-        if wing[i][j] == nil then wing[i][j] = " " end
+        if wing[i][j] == nil then wing[i][j] = L.X end
       end
-      wing[i][col] = "|"
+      wing[i][col] = L.W
     end
     local b_row = wing[ib]
-    if b_row[1] == nil or b_row[1] == " " then
-      b_row[1] = a < b and ">" or "-"
+    if b_row[1] == nil or b_row[1] == L.X then
+      b_row[1] = a < b and L.R or L.S
     end
     for i=1,col-1 do
-      if b_row[i] == nil or b_row[i] == L["X"] then b_row[i] = "-" end
+      if b_row[i] == nil or b_row[i] == L.X then b_row[i] = L.S end
     end
-    b_row[col] = "'"
+    b_row[col] = L.SW
   end
 end
 
--- write
-local data = {}
-table.insert(data, "<nav id=\"sitemap\">")
-table.insert(data, "<header>")
-table.insert(data, "<h1>sitemap</h1>")
-table.insert(data, "</header>")
-table.insert(data, "<pre>")
+-- construct data lines
+local lines = {}
+table.insert(lines, "<article id=\"sitemap\" class=\"post tail\">")
+table.insert(lines, "<header>")
+table.insert(lines, "<h1>sitemap</h1>")
+table.insert(lines, "</header>")
+table.insert(lines, "<pre>")
 
 -- pad right wing
-local r_wing_pad = 1
-for _,len in pairs(r_wing) do
-  if #len > r_wing_pad then r_wing_pad = #len end
+local arma_pad = 1
+for _,len in pairs(arma) do
+  if #len > arma_pad then arma_pad = #len end
 end
 -- pad node names
 local node_pad = 1
-for _,s in pairs(layout) do
+for _,s in pairs(list) do
   if s:len() > node_pad then node_pad = s:len() end
 end
 
-for i,v in ipairs(layout) do
+for i,v in ipairs(list) do
   local row = {}
   local v = ("%-"..node_pad.."s"):format(v)
   local a = v:gsub("(.+)%.md", "<a href=\"%1.html\">%0</a>")
-  table.insert(row,(("%"..r_wing_pad.."s"):format(table.concat(reverse(r_wing[i])))))
-  table.insert(row,((" %s "):format(a)))
-  table.insert(row,(table.concat(l_wing[i])))
+  table.insert(row, (("%"..arma_pad.."s"):format(table.concat(reverse(arma[i])))))
+  table.insert(row, ((" %s "):format(a)))
+  table.insert(row, (table.concat(armb[i])))
 
-  table.insert(data,table.concat(row))
+  table.insert(lines, table.concat(row))
 end
+table.insert(lines, "</pre>")
+table.insert(lines, "</article>")
+local data = table.concat(lines, "\n")
 
-table.insert(data, "</pre>")
-table.insert(data, "</nav>")
-
-local f = assert(io.open(arg[2], "w"), "\n" ..
-  "[ERROR] could not open " .. arg[2] .. " for writing.")
-f:write(table.concat(data, "\n"))
+-- read existing data from output_file
+local f = assert(io.open(output_file), "\n" ..
+  "[ERROR] could not open " .. output_file .. " for reading.")
+local data_old = f:read("a")
 f:close()
+
+-- write to output_file if data changed
+if data ~= data_old then
+  local f = assert(io.open(output_file, "w"), "\n" ..
+    "[ERROR] could not open " .. output_file .. " for writing.")
+  f:write(data)
+  f:close()
+end
diff --git a/pandoc/templates/bavbavhaus.net.html5 b/pandoc/templates/bavbavhaus.net.html5
index 4fe200e..965a4ba 100644
--- a/pandoc/templates/bavbavhaus.net.html5
+++ b/pandoc/templates/bavbavhaus.net.html5
@@ -24,7 +24,9 @@ $endif$
 <header>
 <h1><a href="$url$">$pagetitle$</a></h1>
 $if(abstract)$
+<div class="abstract">
 $abstract$
+</div>
 $endif$
 </header>
 $if(toc)$
@@ -37,7 +39,7 @@ $table-of-contents$
 $endif$
 $body$
 </article>
-$for(linkparts)$
+$for(parts)$
 $it$
 $endfor$
 </main>
diff --git a/pandoc/templates/bavbavhaus.net.part.html5 b/pandoc/templates/bavbavhaus.net.part.html5
index 6ecbc41..fd1c28f 100644
--- a/pandoc/templates/bavbavhaus.net.part.html5
+++ b/pandoc/templates/bavbavhaus.net.part.html5
@@ -2,7 +2,9 @@
 <header>
 <h1><a href="$url$">$pagetitle$</a></h1>
 $if(abstract)$
+<div class="abstract">
 $abstract$
+</div>
 $endif$
 </header>
 $if(toc)$