Merge pull request #68 from bobleesj/cookie-citation

Add citation to README.rst and index.rst in document

Author: sbillinge

README.rst

@@ -44,9 +44,15 @@ For more information about the diffpy.snmf library, please consult our `online d
 Citation
 --------
 
-If you use diffpy.snmf in a scientific publication, we would like you to cite this package as
+If you use this program for a scientific research that leads
+to publication, we ask that you acknowledge use of the program
+by citing the following paper in your publication:
+
+   Ran Gu, Yevgeny Rakita, Ling Lan, Zach Thatcher, Gabrielle E. Kamm, Daniel O’Nolan, Brennan Mcbride, Allison Wustrow, James R. Neilson, Karena W. Chapman, Qiang Du, and Simon J. L. Billinge,
+   `Stretched Non-negative Matrix Factorization
+   <https://doi.org/10.48550/arXiv.2311.15173>`__,
+   arXiv:2311.15173 [cond-mat.mtrl-sci] (2023).
 
-        diffpy.snmf Package, https://github.com/diffpy/diffpy.snmf
 
 Installation
 ------------

doc/source/index.rst

@@ -38,6 +38,19 @@ within the chemical phases through its addition of stretching factors.
 It is important to note that the user must specify the number of component signals to obtain from the experimental data.
 Non-physical results may be obtained if the number of anticipated component signals is too high.
 
+Citation
+--------
+
+If you use this program for a scientific research that leads
+to publication, we ask that you acknowledge use of the program
+by citing the following paper in your publication:
+
+   Ran Gu, Yevgeny Rakita, Ling Lan, Zach Thatcher, Gabrielle E. Kamm, Daniel O’Nolan, Brennan Mcbride, Allison Wustrow, James R. Neilson, Karena W. Chapman, Qiang Du, and Simon J. L. Billinge,
+   `Stretched Non-negative Matrix Factorization
+   <https://doi.org/10.48550/arXiv.2311.15173>`__,
+   arXiv:2311.15173 [cond-mat.mtrl-sci] (2023).
+
+
 Authors
 -------