provide reference to kwant paper, take over "citing kwant" from website

CITING

-==========================
-Suggested acknowledgements
-==========================
+============
+Citing Kwant
+============
 
 We provide Kwant as free software under a :doc:`BSD license <license>` as a
-service to the physics community.  If you have used Kwant for work that has lead
-to a scientific publication, please mention this explicitly in the text body.
-In addition, we ask you to cite the main paper that introduces Kwant:
+service to the physics community.  If you have used Kwant for work that has
+lead to a scientific publication, please mention the fact that you used it
+explicitly in the text body.  For example, you may add
 
-  The reference is provided at the `Kwant website
-  <http://kwant-project.org/paper>`_.
+  *the numerical calculations were performed using the Kwant code*
+
+to the description of your numerical calculations.  In addition, we ask you to
+cite the main paper that introduces Kwant:
+
+  C. W. Groth, M. Wimmer, A. R. Akhmerov, X. Waintal,
+  *Kwant: a software package for quantum transport*,
+  `New J. Phys. 16, 063065 (2014)
+  <http://iopscience.iop.org/1367-2630/16/6/063065/article>`_.
+
+
+Other references we ask you to consider
+---------------------------------------
 
 If you have profited from the quantum transport functionality of Kwant, please
 also cite the upcoming paper that describes the relevant algorithms. The
-reference will be added to this document later, and will also be available at
-`<http://kwant-project.org/citing>`_.
+reference will also be added here once it is available.
 
 Kwant owes much of its current performance to the use of the `MUMPS
 <http://graal.ens-lyon.fr/MUMPS/>`_ library for solving systems of sparse linear
 equations.  If you have done high-performance calculations, we suggest citing
 
   P. R. Amestoy, I. S. Duff, J. S. Koster, J. Y. L’Excellent, SIAM. J. Matrix
-  Anal. & Appl. **23** (1), 15 (2001).
+  Anal. & Appl. 23 (1), 15 (2001).
 
 Finally, if you use the routine for generation of circular ensembles of random
 matrices, please cite
 
-  \F. Mezzadri, Notices Am. Math. Soc. **54**, 592 (2007).
+  \F. Mezzadri, Notices Am. Math. Soc. 54, 592 (2007).