Add citation information

README.md

@@ -48,7 +48,7 @@ We have prepared installation instructions for
 [Perlmutter (NERSC)](https://optimas.readthedocs.io/en/latest/user_guide/installation_perlmutter.html).
 
 ## Citing optimas
-If your usage of `optimas` leads to a scientific publication, please consider citing the optimas paper:
+If your usage of `optimas` leads to a scientific publication, please consider citing the original [paper](https://link.aps.org/doi/10.1103/PhysRevAccelBeams.26.084601):
 ```bibtex
 @article{PhysRevAccelBeams.26.084601,
     title     = {Bayesian optimization of laser-plasma accelerators assisted by reduced physical models},

doc/source/user_guide/citation.rst

@@ -0,0 +1,38 @@
+Citing optimas
+==============
+
+If your usage of ``optimas`` leads to a scientific publication, please consider
+citing the original `paper <https://link.aps.org/doi/10.1103/PhysRevAccelBeams.26.084601>`_:
+
+.. code-block:: bibtex
+
+    @article{PhysRevAccelBeams.26.084601,
+        title     = {Bayesian optimization of laser-plasma accelerators assisted by reduced physical models},
+        author    = {Ferran Pousa, A. and Jalas, S. and Kirchen, M. and Martinez de la Ossa, A. and Th\'evenet, M. and Hudson, S. and Larson, J. and Huebl, A. and Vay, J.-L. and Lehe, R.},
+        journal   = {Phys. Rev. Accel. Beams},
+        volume    = {26},
+        issue     = {8},
+        pages     = {084601},
+        numpages  = {9},
+        year      = {2023},
+        month     = {Aug},
+        publisher = {American Physical Society},
+        doi       = {10.1103/PhysRevAccelBeams.26.084601},
+        url       = {https://link.aps.org/doi/10.1103/PhysRevAccelBeams.26.084601}
+    }
+
+and libEnsemble:
+
+.. code-block:: bibtex
+
+    @article{Hudson2022,
+        title   = {{libEnsemble}: A Library to Coordinate the Concurrent
+                    Evaluation of Dynamic Ensembles of Calculations},
+        author  = {Stephen Hudson and Jeffrey Larson and John-Luke Navarro and Stefan M. Wild},
+        journal = {{IEEE} Transactions on Parallel and Distributed Systems},
+        volume  = {33},
+        number  = {4},
+        pages   = {977--988},
+        year    = {2022},
+        doi     = {10.1109/tpds.2021.3082815}
+    }

doc/source/user_guide/index.rst

@@ -19,4 +19,10 @@ User guide
 
    basic_usage/basic_setup
    basic_usage/running_with_simulations
-   basic_usage/analyze_output
+   basic_usage/analyze_output
+
+.. toctree::
+   :maxdepth: 1
+   :caption: Citation
+
+   citation