Update README.md

README.md

@@ -1,5 +1,7 @@
 # scratchy
-Additional Material for the paper "Scratchy: A Lightweight Modular Autonomous Robot for Robotic Competitions"
+Additional Material for the paper "Scratchy: A Lightweight Modular Autonomous Robot for Robotic Competitions".
+
+A preprint can be found on [arxiv](https://arxiv.org/abs/1905.05642).
 
 ![Scratchy drawing](images/scratchy_drawing.png)
 
@@ -20,3 +22,18 @@ Additional Material for the paper "Scratchy: A Lightweight Modular Autonomous Ro
 * Build:
   * Go to workspace
   * `catkin_make` 
+
+
+# Citation
+
+```
+@inproceedings{memmesheimer2019scratchy,
+  title={Scratchy: A Lightweight Modular Autonomous Robot for Robotic Competitions},
+  author={Memmesheimer, Raphael and Kuhlmann, Isabelle and Mints, Mark and Schmidt, Patrik and Korbach, Christian and Germann, Ida and Paulus, Dietrich},
+  booktitle={2019 IEEE International Conference on Autonomous Robot Systems and Competitions (ICARSC)},
+  pages={1--6},
+  year={2019},
+  organization={IEEE}
+}
+
+```