diff --git a/.gitignore b/.gitignore
index 579c4f9..5271d63 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,3 +5,7 @@
 *.lot
 *.toc
 *.pdf
+*.bbl
+*.xml
+*.blg
+*.bcf
diff --git a/group_A.tex b/group_A.tex
index 79c7f37..47b012f 100644
--- a/group_A.tex
+++ b/group_A.tex
@@ -35,9 +35,12 @@
 
 \subsection{Notationselemente des \diagrammname}
 
-
+Der schlaue Text steht in~\cite{Eckert2018}.
 
 \subsection{Beispiel des \diagrammname \ im Dokumentenmanagement}
 
 
 
+
+
+
diff --git a/group_B.tex b/group_B.tex
index 9a8d971..2fab3ae 100644
--- a/group_B.tex
+++ b/group_B.tex
@@ -32,9 +32,11 @@
 
 \subsection{Notationselemente des \diagrammname}
 
-
+Der schlaue Text steht in~\cite{Andriesse2018}
 
 \subsection{Beispiel des \diagrammname \ im Dokumentenmanagement}
 
 
 
+
+
diff --git a/group_C.tex b/group_C.tex
index 9a8d971..6c7b85c 100644
--- a/group_C.tex
+++ b/group_C.tex
@@ -32,9 +32,12 @@
 
 \subsection{Notationselemente des \diagrammname}
 
-
+Der schlaue Text steht in~\cite{Nikkel2016}
 
 \subsection{Beispiel des \diagrammname \ im Dokumentenmanagement}
 
 
 
+
+
+
diff --git a/literature/_groupA.bib b/literature/_groupA.bib
new file mode 100644
index 0000000..a39a713
--- /dev/null
+++ b/literature/_groupA.bib
@@ -0,0 +1,9 @@
+@BOOK{Eckert2018,
+	AUTHOR = {Eckert, Claudia},
+	YEAR = {2018},
+	TITLE = {IT-Sicherheit - Konzepte – Verfahren – Protokolle},
+	EDITION = {},
+	ISBN = {978-3-110-56390-0},
+	PUBLISHER = {Walter de Gruyter GmbH \& Co KG},
+	ADDRESS = {Berlin},
+}
\ No newline at end of file
diff --git a/literature/_groupB.bib b/literature/_groupB.bib
new file mode 100644
index 0000000..8316d12
--- /dev/null
+++ b/literature/_groupB.bib
@@ -0,0 +1,10 @@
+
+@BOOK{Andriesse2018,
+	AUTHOR = {Andriesse, Dennis},
+	YEAR = {2018},
+	TITLE = {Practical Binary Analysis - Build Your Own Linux Tools for Binary Instrumentation, Analysis, and Disassembly},
+	EDITION = {},
+	ISBN = {978-1-593-27912-7},
+	PUBLISHER = {No Starch Press},
+	ADDRESS = {München},
+}
\ No newline at end of file
diff --git a/literature/_groupC.bib b/literature/_groupC.bib
new file mode 100644
index 0000000..993290f
--- /dev/null
+++ b/literature/_groupC.bib
@@ -0,0 +1,10 @@
+
+@BOOK{Nikkel2016,
+	AUTHOR = {Nikkel, Bruce},
+	YEAR = {2016},
+	TITLE = {Practical Forensic Imaging - Securing Digital Evidence with Linux Tools},
+	EDITION = {},
+	ISBN = {978-1-593-27800-7},
+	PUBLISHER = {No Starch Press},
+	ADDRESS = {München},
+}
\ No newline at end of file
diff --git a/main.tex b/main.tex
index 59c4cec..d363d5d 100644
--- a/main.tex
+++ b/main.tex
@@ -22,9 +22,17 @@
 \usepackage[automark,headsepline,footsepline]{scrlayer-scrpage}
 
 
+\usepackage[backend=biber,refsection=section]{biblatex} % load the package
+\addbibresource{literature\_groupA.bib} 
+\addbibresource{literature\_groupB.bib}
+\addbibresource{literature\_groupC.bib}  
+
+
+\defbibheading{subbibliography}[Literatur]{\addsec{#1}}
 
 \begin{document}
 \title{Software Engineering 2}
+\author{Prof. Dr. Jessica Steinberger, Studierende CSB/IMB}
 \subtitle{UML-Diagramme}
 \maketitle
 
@@ -41,7 +49,7 @@
 UML verfügt über sechs Strukturdiagrammtypen, die von der einzelnen Klasse bis hin zur Gliederung vollständiger Architekturen und Systeme reichen.
 
 
-\foreach \n in {A,...,C}{\input{group_\n.tex}\newpage}
+\foreach \n in {A,...,C}{\input{group_\n.tex}\printbibliography[heading=subbibliography]\newpage}
 
 %\chapter{Verhaltensdiagramme}