diff --git a/bib.bib b/bib.bib
index a264c78..499b3c1 100644
--- a/bib.bib
+++ b/bib.bib
@@ -1,41 +1,20 @@
 @misc{ref1,
-        author = "D.E. Knuth",
-        title = "Two notes on notation",
-        howpublished = "\url{http://www.example.com}"
-        year = "1992",
+        author = "Wikipedia",
+        title = "{RSA} (Cryptosystem) --- {W}ikipedia{,} Die freie Enzyklopädie",
+        howpublished = "\url{https://en.wikipedia.org/wiki/RSA_(cryptosystem)}"
+        year = "2016",
 }
 
 @misc{ref2,
-        author = "D.E. Knuth",
-        title = "Two notes on notation",
-        howpublished = "\url{http://www.example.com}"
-        year = "1992",
+        author = "Wikipedia",
+        title = "{RSA}-Kryptosystem --- {W}ikipedia{,} Die freie Enzyklopädie",
+        howpublished = "\url{https://de.wikipedia.org/wiki/RSA-Kryptosystem}"
+        year = "2016",
 }
 
 @misc{ref3,
-        author = "D.E. Knuth",
-        title = "Two notes on notation",
-        howpublished = "\url{http://www.example.com}"
-        year = "1992",
+        author = "L. Van Houtven",
+        title = "Crypto 101",
+        howpublished = "\url{https://www.crypto101.io/}"
+        year = "2016",
 }
-
-@misc{ref4,
-        author = "D.E. Knuth",
-        title = "Two notes on notation",
-        howpublished = "\url{http://www.example.com}"
-        year = "1992",
-}
-
-@misc{ref5,
-        author = "D.E. Knuth",
-        title = "Two notes on notation",
-        howpublished = "\url{http://www.example.com}"
-        year = "1992",
-}
-
-@misc{ref6,
-        author = "D.E. Knuth",
-        title = "Two notes on notation",
-        howpublished = "\url{http://www.example.com}"
-        year = "1992",
-}
\ No newline at end of file