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+
+@book{unbehauen2000RT2,
+  title={Regelungstechnik. 2. Zustandsregelungen, digitale und nichtlineare Regelsysteme},
+  author={Unbehauen, H.},
+  isbn={9783528733483},
+  series={Regelungstechnik},
+  url={https://books.google.de/books?id=Z5SSHn6MHQsC},
+  year={2000},
+  publisher={Vieweg + Teubner}
+}
+
+@MISC{yawpitchroll2013,
+author = {{Dennis Freeman}},
+title = {{MIT-Online Course: Signals and Systems}},
+month = {Juni},
+year = {2013},
+note = {Lecture 7: Discrete Approximation of Continuous-Time Systems. \url{https://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-003-signals-and-systems-fall-2011/lecture-videos/lecture-7-discrete-approximation-of-continuous-time-systems/}}
+}
+
+
+
+
+@MISC{zeppelin2013,
+author = {{ZLT Zeppelin Luftschifftechnik}},
+title = {{Der Zeppelin NT}},
+month = {Juni},
+year = {2013},
+note = {\url{http://www.zeppelinflug.de/zeppelin-nt-211.html}}
+}
+
+@MISC{mathworks2013,
+author = {MathWorks},
+title = {{Simulink Target Hardware}},
+month = {Juni},
+year = {2013},
+note = {\url{http://www.mathworks.de/discovery/simulink-target-hardware.html}}
+}
+
+
+
+@MISC{bild_quad,
+author = {Tilman Pietzsch},
+title = {{Microcopter}},
+month = {November},
+year = {2011},
+note = {\url{http://www.microcopters.de/photos/98/dsc-1577.jpg}}
+}
+