Added citation

Author: venthur

README.md

@@ -21,5 +21,23 @@ $ sudo modprobe -r lp
 $ sudo chmod 666 /dev/parport0
 ```
 
- -- Bastian Venthur <[email protected]>  2008-09-16
+Citing Us
+=========
+
+If you use Pyff for anything that results in a publication, We humbly ask you to
+cite us:
+
+```bibtex
+@ARTICLE{venthur2010,
+    author={Venthur, Bastian  and  Scholler, Simon  and  Williamson, John  and  Dähne, Sven  and  Treder, Matthias S  and  Kramarek, Maria T  and  Müller, Klaus-Robert  and  Blankertz, Benjamin},
+    title={Pyff---A Pythonic Framework for Feedback Applications and Stimulus Presentation in Neuroscience},
+    journal={Frontiers in Neuroinformatics},
+    volume={4},
+    year={2010},
+    number={100},
+    url={http://www.frontiersin.org/neuroinformatics/10.3389/fninf.2010.00100/abstract},
+    doi={10.3389/fninf.2010.00100},
+    issn={1662-5196},
+}
+```