Add example/example.bib

example/example.bib

+@article{einstein1905tragheit,
+  title = {Ist die Trägheit eines Körpers von seinem Energieinhalt abhängig?},
+  author = {Einstein, Albert},
+  journal = {Annalen der Physik},
+  volume = {323},
+  number = {13},
+  pages = {639-641},
+  year = {1905},
+}
+
+@article{tolkamp10cows,
+  title = {Are cows more likely to lie down the longer they stand?},
+  author = {Tolkamp, Bert J. and Haskell, Marie J. and Langford, Fritha M. and Roberts, David J. and Morgan, Colin A.},
+  journal = {Applied Animal Behaviour Science},
+  volume = {124},
+  number = {1-2},
+  pages = {1-10},
+  year = {2010},
+  publisher = {Elsevier},
+}