Add citation for the CHIPS gamma–nuclear cross-section model

Author: Soon Yung Jun

doc/_static/zotero.bib

@@ -3718,3 +3718,15 @@ @article{wright-geant4bertini-2015
   issn = {01689002},
   doi = {10.1016/j.nima.2015.09.058}
 }
+
+@article{chips-gamma-nuclear-xs-2000,
+  title = {The Chiral invariant phase space event generator, iii: modeling of
+real and virtual photon interactionswith nuclei below pion production threshold.},
+  author = {Degtyarenko P.V., Kossov M.V. and Wellisch, H.-P.},
+  year = 2000,
+  month = dec,
+  journal = {European Physical Journal A},
+  volume = {9},
+  pages = {421--424},
+  doi = {10.1007/s100500070026}
+}