Added mesa pd preprint

bibliography.bib

@@ -1828,4 +1828,14 @@ f
   publisher = {Academic Press},
 }
 
+@Article{eibl2019modular,
+  author  = {Eibl, Sebastian and R{\"u}de, Ulrich},
+  journal = {arXiv preprint arXiv:1906.10963},
+  title   = {A modular and extensible software architecture for particle dynamics},
+  year    = {2019},
+}
+
+@Article{,
+}
+
 @Comment{jabref-meta: databaseType:bibtex;}