diff --git a/VL1.tex b/VL1.tex
index 09b789e..68e1dfc 100644
--- a/VL1.tex
+++ b/VL1.tex
@@ -15,6 +15,7 @@
 
 % title page information
 \author{Julian Ospald}
+
 \institute{FH Bielefeld}
 \title{Haskell: introduction}
 
@@ -57,6 +58,15 @@
 
 \begin{document}
 
+% redefinition of author, fails before document env
+\author{
+\begin{tabular}{r@{ }l}
+Author: & Julian Ospald \\[1ex]
+Parts stolen from: & Brent Yorgey\\
+& (link at the end of the document)
+\end{tabular}
+}
+
 \frame{\titlepage}
 
 \begin{frame}
@@ -411,7 +421,7 @@ For haskell IDEs, see \url{https://wiki.haskell.org/IDEs}
 \begin{frame}
 \frametitle{Further reading and useful links}
 \begin{itemize}
-\item the most popular haskell course:\\ \url{https://www.seas.upenn.edu/~cis194/fall14/spring13/lectures.html}
+\item the most popular haskell course from Brent Yorgey:\\ \url{https://www.seas.upenn.edu/~cis194/fall14/spring13/lectures.html}
 \item very verbose and enthusiastic haskell book, good for reading once:\\ \url{http://learnyouahaskell.com}
 \item collection of websites teaching haskell:\\ \url{https://github.com/bitemyapp/learnhaskell}
 \item haskell programming tips (and wiki):\\ \url{https://wiki.haskell.org/Haskell_programming_tips}