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diff --git a/Text/Pandoc/Biblio.hs b/Text/Pandoc/Biblio.hs
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+{-# LANGUAGE PatternGuards, CPP #-}
+{-
+Copyright (C) 2008 Andrea Rossato <andrea.rossato@ing.unitn.it>
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+-}
+
+{- |
+   Module      : Text.Pandoc.Biblio
+   Copyright   : Copyright (C) 2008 Andrea Rossato
+   License     : GNU GPL, version 2 or above
+
+   Maintainer  : Andrea Rossato <andrea.rossato@ing.unitn.it>
+   Stability   : alpha
+   Portability : portable
+-}
+
+#ifdef _CITEPROC
+module Text.Pandoc.Biblio ( processBiblio ) where
+
+import Control.Monad ( when )
+import Data.List
+import Text.CSL
+import Text.Pandoc.Definition
+
+#else
+module Text.Pandoc.Biblio () where
+#endif
+
+#ifdef _CITEPROC
+processBiblio :: String -> [Reference] -> Pandoc -> IO Pandoc
+processBiblio cf r p
+    = if null r then return p
+      else do
+        when (null cf) $ error "Missing the needed citation style file"
+        csl  <- readCSLFile cf
+        let groups     = queryPandoc getCite p
+            citations  = zip groups . processCitations csl r $ groups
+            Pandoc m b = processPandoc (processCite citations) p
+        return $ Pandoc m $ b ++ renderBiblio csl r p
+
+renderBiblio :: Style -> [Reference] -> Pandoc -> [Block]
+renderBiblio s r p
+    = map (read . renderPandoc') $ processBibliography s refs
+      where cits = nub . map fst . concat . queryPandoc getCite $ p
+            refs = getRefs r $ zip cits (repeat "")
+
+processCite :: [([Target],[FormattedOutput])] -> Inline -> Inline
+processCite cs il
+    | Cite t _ <- il = Cite t (process t)
+    | otherwise      = il
+    where
+      process t = case elemIndex t (map fst cs) of
+                    Just i -> read . renderPandoc $ snd (cs !! i)
+                    Nothing -> [Str ("Error processing " ++ show t)]
+
+getCite :: Inline -> [[(String,String)]]
+getCite i | Cite t _ <- i = [t]
+          | otherwise     = []
+
+getRefs :: [Reference] -> [Target] -> [Reference]
+getRefs r = map $ getReference r
+
+#endif