new Preliminaries (#53)

* fixed typos

* started a new preliminaries from the old one, not done yet

* fixed the preliminaries

* added intro to the section

* finished the rewriting of preliminaries

report/src/bib/main.bib

@@ -151,4 +151,56 @@ @article{p7
     journal = {AAU Student Projects},
     year = {2023},
     eprint = {https://kbdk-aub.primo.exlibrisgroup.com/permalink/45KBDK_AUB/a7me0f/alma9921651457905762},
+}
+
+@article{chavan2013overview,
+  title={An overview of speech recognition using HMM},
+  author={Chavan, Rupali S and Sable, Ganesh S},
+  journal={International Journal of Computer Science and Mobile Computing},
+  volume={2},
+  number={6},
+  pages={233--238},
+  year={2013}
+}
+
+@article{de2007hidden,
+  title={Hidden Markov models in bioinformatics},
+  author={De Fonzo, Valeria and Aluffi-Pentini, Filippo and Parisi, Valerio},
+  journal={Current Bioinformatics},
+  volume={2},
+  number={1},
+  pages={49--61},
+  year={2007},
+  publisher={Bentham Science Publishers}
+}
+
+@inproceedings{murveit1990integrating,
+  title={Integrating natural language constraints into HMM-based speech recognition},
+  author={Murveit, Hy and Moore, Robert},
+  booktitle={International Conference on Acoustics, Speech, and Signal Processing},
+  pages={573--576},
+  year={1990},
+  organization={IEEE}
+}
+
+@article{baum1966statistical,
+  title={Statistical inference for probabilistic functions of finite state Markov chains},
+  author={Baum, Leonard E and Petrie, Ted},
+  journal={The annals of mathematical statistics},
+  volume={37},
+  number={6},
+  pages={1554--1563},
+  year={1966},
+  publisher={JSTOR}
+}
+
+@article{baum1970maximization,
+  title={A maximization technique occurring in the statistical analysis of probabilistic functions of Markov chains},
+  author={Baum, Leonard E and Petrie, Ted and Soules, George and Weiss, Norman},
+  journal={The annals of mathematical statistics},
+  volume={41},
+  number={1},
+  pages={164--171},
+  year={1970},
+  publisher={JSTOR}
 }