added troublesome bibfile

tests/zoo/incollections.bib

@@ -0,0 +1,14 @@
+@incollection{
+year={2007},
+isbn={978-3-540-74957-8},
+booktitle={Machine Learning: ECML 2007},
+volume={4701},
+series={Lecture Notes in Computer Science},
+editor={Kok, JoostN. and Koronacki, Jacek and Mantaras, RaomonLopezde and Matwin, Stan and Mladenič, Dunja and Skowron, Andrzej},
+doi={10.1007/978-3-540-74958-5_70},
+title={Transfer Learning in Reinforcement Learning Problems Through Partial Policy Recycling},
+url={http://dx.doi.org/10.1007/978-3-540-74958-5_70},
+publisher={Springer Berlin Heidelberg},
+author={Ramon, Jan and Driessens, Kurt and Croonenborghs, Tom},
+pages={699-707}
+}