diff --git a/Lectures/L03_Requirements/Requirements.pdf b/Lectures/L03_Requirements/Requirements.pdf
index e5cfbb5eec097dcf1ab1e6aead963fe9ba0e3fcf..c5b61bf5a41e6373051210edb725442abfc7d4f0 100644
Binary files a/Lectures/L03_Requirements/Requirements.pdf and b/Lectures/L03_Requirements/Requirements.pdf differ
diff --git a/Lectures/L03_Requirements/Requirements.tex b/Lectures/L03_Requirements/Requirements.tex
index 4215887bd552c9e77a3027a6314f716029e30098..51e20f5c0c6ecd2428fc6b79aed81f3da8cceae2 100755
--- a/Lectures/L03_Requirements/Requirements.tex
+++ b/Lectures/L03_Requirements/Requirements.tex
@@ -147,7 +147,7 @@ Final Documentation & Week 13 & Dec 6\\
 \frametitle{Problem Statement}
 \bi
 \item Written in LaTeX
-\item Due electronically (on GitLab) by deadline
+\item Due electronically (on GitHub) by deadline
 \item Comments might be typed directly into your source
 \item For later assignments with LaTeX source, include the LaTeX
   commands for comments
@@ -245,7 +245,7 @@ written modules
 \begin{itemize}
 \item Measures of the excellence or worth of a software product (code or document) or process
 with respect to some aspect
-\item \structure{What are some important aspects (qualties) for scientific softwarwe?}
+\item \structure{What are some important aspects (qualities) for scientific software?}
 \item User Satisfaction = The Important Qualities are High + Within Budget
 \end{itemize}
 \end{frame}
@@ -287,6 +287,8 @@ with respect to some aspect
 
 \end{itemize}
 
+Definitions in \cite{GhezziEtAl2003}.
+
 \end{frame}
 
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