diff --git a/Bachelorarbeit.tex b/Bachelorarbeit.tex
index 29f040c..25d8de5 100644
--- a/Bachelorarbeit.tex
+++ b/Bachelorarbeit.tex
@@ -675,6 +675,7 @@ Quellenreferenzen
 \item \cite{w3c:turtle}[Die Turtle-Notation]
 \item \cite{hitzler:semanticweb}[Grundlagen Semantic Web]
 \item \cite{cqels:native}[Mehr CQELS]
+\item \cite{barbieri:csparql}[Erstes C-SPARQL Proposal]
 \end{itemize}
 
 
diff --git a/Literaturverweise.bib b/Literaturverweise.bib
index c601caa..ec9122d 100644
--- a/Literaturverweise.bib
+++ b/Literaturverweise.bib
@@ -143,4 +143,14 @@
   url       = {http://dx.doi.org/10.1007/978-3-642-25073-6_24},
 }
 
+@InProceedings{barbieri:csparql,
+  author    = {Davide Francesco Barbieri and Daniele Braga and Stefano Ceri and Emanuele Della Valle and Michael Grossniklaus},
+  title     = {C-{SPARQL}},
+  booktitle = {Proceedings of the 18th international conference on World wide web - {WWW} {\textquotesingle}09},
+  year      = {2009},
+  publisher = {Association for Computing Machinery ({ACM})},
+  doi       = {10.1145/1526709.1526856},
+  url       = {http://dx.doi.org/10.1145/1526709.1526856},
+}
+
 @Comment{jabref-meta: databaseType:biblatex;}