diff --git a/book.pdf b/book.pdf
index d33718b..8031c4e 100644
Binary files a/book.pdf and b/book.pdf differ
diff --git a/book.tex b/book.tex
index c25d5b3..c97b67c 100644
--- a/book.tex
+++ b/book.tex
@@ -8,7 +8,7 @@
 \usepackage[table]{xcolor}
 \usepackage{tikz}
 \usepackage{multicol}
-\usepackage{hyperref}
+\usepackage[colorlinks=true]{hyperref}
 \usepackage{array}
 \usepackage{microtype}
 
@@ -105,9 +105,8 @@
 \include{chapter16}
 %\include{chapter20}
 \chapter{State Graphs}
-Please watch the video about state graphs.
-The video should be linked on the graph overview site, but please push Johannes
-to fix the link here too.
+Please watch the video about state graphs.\\
+\url{https://www.youtube.com/watch?v=RdK3b9QWs94}
 
 \part{Advanced topics}
 \include{chapter15}
diff --git a/chapter11.tex b/chapter11.tex
index e093129..cd2f2b5 100644
--- a/chapter11.tex
+++ b/chapter11.tex
@@ -545,11 +545,11 @@ with weight $w$. For example, the graph
 can be stored as follows:
 \begin{lstlisting}
 g.assign(4, {});
-g[0].push_back({1,5});
-g[1].push_back({2,7});
-g[1].push_back({3,6});
-g[2].push_back({3,5});
-g[3].push_back({0,2});
+g[0].emplace_back(1,5);
+g[1].emplace_back(2,7);
+g[1].emplace_back(3,6);
+g[2].emplace_back(3,5);
+g[3].emplace_back(0,2);
 \end{lstlisting}
 
 The benefit of using adjacency lists is that
@@ -723,11 +723,11 @@ Thus, the graph
 \end{center}
 can be represented as follows:
 \begin{lstlisting}
-edges.push_back({0,2});
-edges.push_back({1,3});
-edges.push_back({1,4});
-edges.push_back({2,4});
-edges.push_back({3,1});
+edges.emplace_back(0,2);
+edges.emplace_back(1,3);
+edges.emplace_back(1,4);
+edges.emplace_back(2,4);
+edges.emplace_back(3,1);
 \end{lstlisting}
 
 \noindent
@@ -756,14 +756,14 @@ For example, the graph
 \end{tikzpicture}
 \end{center}
 \begin{samepage}
-can be represented as follows\footnote{In some older compilers, the function
-\texttt{make\_tuple} must be used instead of the braces (for example,
-\texttt{make\_tuple(1,2,5)} instead of \texttt{\{1,2,5\}}).}:
+  can be represented as follows\footnote{Instead of \texttt{emplace\_back(0,2,5)},
+    one could also write \texttt{edges.push\_back(\{0,2,5\})} or
+     \texttt{edges.push\_back(make\_tuple(0,2,5))}, however, using \texttt{emplace\_back} is generally preferred.}:
 \begin{lstlisting}
-edges.push_back({0,2,5});
-edges.push_back({1,3,7});
-edges.push_back({1,4,6});
-edges.push_back({2,4,5});
-edges.push_back({3,1,2});
+edges.emplace_back(0,2,5);
+edges.emplace_back(1,3,7);
+edges.emplace_back(1,4,6);
+edges.emplace_back(2,4,5);
+edges.emplace_back(3,1,2);
 \end{lstlisting}
 \end{samepage}