Update thesis with first feedback from @jstvssr

docs/thesis/ref.bib

@@ -868,3 +868,21 @@ numpages = {3}
   year={2019},
   publisher={Springer}
 }
+
+@book{Rumbaugh2004,
+  title = {Unified Modeling Language Reference Manual, The (2nd Edition)},
+  publisher = {Pearson Higher Education},
+  year = {2004},
+  author = {Rumbaugh, James and Jacobson, Ivar and Booch, Grady},
+  isbn = {0321245628}
+}
+
+@inproceedings{wang2020producer,
+  title={Producer-consumer model based thread pool design},
+  author={Wang, Liangzhou and Wang, Chaobin},
+  booktitle={Journal of Physics: Conference Series},
+  volume={1616},
+  pages={012073},
+  year={2020},
+  organization={IOP Publishing}
+}