diff --git a/Makefile b/Makefile
index be5f167..f369c0e 100644
--- a/Makefile
+++ b/Makefile
@@ -4,7 +4,7 @@ ASCIIMATH=filters/asciimath/pandoc-asciimath
 
 HS_FILTERS_NAMES =
 PY_FILTERS_NAMES = pandoc-svg.py
-EXT_FILTERS = $(ASCIIMATH)
+EXT_FILTERS = pandoc-crossref $(ASCIIMATH)
 
 HS_FILTERS = $(addprefix filters/, $(HS_FILTERS_NAMES))
 PY_FILTERS = $(addprefix filters/, $(PY_FILTERS_NAMES))
@@ -21,7 +21,7 @@ $(HS_FILTERS):
 	ghc --make $@.hs -o $@	
 
 $(ASCIIMATH):
-	(cd filters/asciimath; make)
+	(cd filters/asciimath; make filter-only)
 
 clean:
 	rm -f $(OUT)
diff --git a/filters/asciimath b/filters/asciimath
index d68cf88..1848358 160000
--- a/filters/asciimath
+++ b/filters/asciimath
@@ -1 +1 @@
-Subproject commit d68cf88317451fc4ae04244802a0992afe91b6b7
+Subproject commit 18483581cecdbffe97810eb0e7292c030fcbf4d9
diff --git a/filters/nice-frac.hs b/filters/nice-frac.hs
deleted file mode 100644
index a4732a4..0000000
--- a/filters/nice-frac.hs
+++ /dev/null
@@ -1,26 +0,0 @@
--- nice-frac.hs
-
-import Text.Pandoc.JSON
-import Text.Regex
-
--- Usefull regex elements
-space :: String
-space = "[ \\t\\n\\r]*"
-num :: String
-num = "([0-9]+)"
-
--- Replace fractions like "(42 / 1)" by "\frac{42}{1}" 
-fracReg :: Regex
-fracReg = mkRegex $
-  "\\(" ++ space ++ num ++ space ++ "/" ++ space ++ num ++ space ++ "\\)"
-frac :: String -> String
-frac s = subRegex fracReg s "\\\\frac{\\1}{\\2}"
-
--- Apply the substitution to all Latex parts on the AST
-niceFrac :: Inline -> Inline
-niceFrac (Math t s) = Math t (frac s)
-niceFrac x = x
-
-main :: IO ()
-main = toJSONFilter niceFrac
-
diff --git a/filters/usual-fun.hs b/filters/usual-fun.hs
deleted file mode 100644
index 00fb098..0000000
--- a/filters/usual-fun.hs
+++ /dev/null
@@ -1,33 +0,0 @@
--- usual-fun.hs
-
-import Text.Pandoc.JSON
-import Text.Regex
-import Data.List (intercalate)
-
--- Association list for usual functions
-usual :: String
-usual = intercalate "|" [
-  "cos", "sin", "tan", "cotan",
-  "arccos", "arcsin", "arctan",
-  "exp", "log"]  
-
--- Remove the '\' before usual functions' names if present
-rmBSReg :: Regex
-rmBSReg = mkRegex $ "(\\\\)(" ++ usual ++ ")\\>"
-rmBS :: String -> String
-rmBS s = subRegex rmBSReg s "\\2"
-
--- Add a '\' before usual functions' names
-addBSReg :: Regex
-addBSReg = mkRegex $ "\\<(" ++ usual ++ ")\\>"
-addBS :: String -> String
-addBS s = subRegex addBSReg s "\\\\\\0"
-
--- Apply the substitution to all Latex parts on the AST
-niceFrac :: Inline -> Inline
-niceFrac (Math t s) = Math t (addBS . rmBS $ s)
-niceFrac x = x
-
-main :: IO ()
-main = toJSONFilter niceFrac
-
diff --git a/notes.md b/notes.md
index 0953d9d..6f87ad4 100644
--- a/notes.md
+++ b/notes.md
@@ -1,7 +1,7 @@
 ---
 # Metadata
 title: Example
-author: Martin Pépin
+author: Kerl13 & Phyks
 date: \today
 # Pandoc-crossref options
 cref: True
@@ -12,5 +12,10 @@ chapters: True
 
 # AsciiMath example
 
-Soit $n in NN$, alors on a
+The following asciimath code 
+
+    sum_(k=1)^n k^3 = ((n(n+1))/2)^2
+
+will be rendered the following way
+
 $$ sum_(k=1)^n k^3 = ((n(n+1))/2)^2 $$