Added infeasibility paper in the documentation
Citing OSQP
===========
-Paper coming soon!
+If you use OSQP for published work, we encourage you to cite the accompanying `paper <http://www.optimization-online.org/DB_FILE/2017/06/6058.pdf>`_ on infeasibility detection with ADMM.
+
+Use the following BibTeX citation:
+
+.. code:: latex
+
+ @article{osqp-infeasibility,
+ title = {Infeasibility detection in the alternating direction method of multipliers for convex optimization},
+ author = {Goran Banjac and Paul Goulart and Bartolomeo Stellato and Stephen Boyd},
+ journal = {optimization-online.org},
+ year = {2017},
+ url = {http://www.optimization-online.org/DB_HTML/2017/06/6058.html},
+ }
