Added citation of ROOM language. Small edits.

references.bib

@@ -144,3 +144,14 @@ url={http://hdl.handle.net/10012/15373}
   year={2004},
   publisher={Springer}
 }
+
+@article{selic1996real,
+  title={{Real-time object-oriented modeling}},
+  author={Selic, Bran},
+  journal={IFAC Proceedings Volumes},
+  volume={29},
+  number={5},
+  pages={1--6},
+  year={1996},
+  publisher={Elsevier}
+}