diff --git a/paper/paper.bib b/paper/paper.bib
index 4ed341e..8717367 100644
--- a/paper/paper.bib
+++ b/paper/paper.bib
@@ -1,99 +1,109 @@
 @article{karakaya2024improved,
-  title={An Improved Cellular Genetic Algorithm with Machine-Coded Operators for Real-Valued Optimisation Problems},
-  author={Karakaya, Sevgi Akten and Satman, Mehmet Hakan},
-  journal={Journal of Engineering Research and Applied Science},
-  volume={13},
-  number={1},
-  pages={2500--2514},
-  year={2024}
+  title   = {An Improved Cellular Genetic Algorithm with Machine-Coded Operators for Real-Valued Optimisation Problems},
+  author  = {Karakaya, Sevgi Akten and Satman, Mehmet Hakan},
+  journal = {Journal of Engineering Research and Applied Science},
+  volume  = {13},
+  number  = {1},
+  pages   = {2500--2514},
+  year    = {2024}
+  % No DOI
 }
 
 @article{satman2013machine,
-  title={Machine coded genetic algorithms for real parameter optimization problems},
-  author={Satman, Mehmet Hakan},
-  journal={Gazi University Journal of Science},
-  volume={26},
-  number={1},
-  pages={85--95},
-  year={2013},
-  publisher={Gazi University}
+  title     = {Machine coded genetic algorithms for real parameter optimization problems},
+  author    = {Satman, Mehmet Hakan},
+  journal   = {Gazi University Journal of Science},
+  volume    = {26},
+  number    = {1},
+  pages     = {85--95},
+  year      = {2013},
+  publisher = {Gazi University}
+  % No DOI
 }
 
 @book{holland1975adaptation,
-  title={Adaptation in Natural and Artificial Systems},
-  author={Holland, John H.},
-  year={1975},
-  publisher={University of Michigan Press},
-  address={Ann Arbor, MI},
-  isbn={9780262581110}
+  title     = {Adaptation in Natural and Artificial Systems},
+  author    = {Holland, John H.},
+  year      = {1975},
+  publisher = {University of Michigan Press},
+  address   = {Ann Arbor, MI},
+  isbn      = {9780262581110}
+  % No DOI
 }
 
 @book{goldberg1989genetic,
-  title={Genetic Algorithms in Search, Optimization, and Machine Learning},
-  author={Goldberg, David E.},
-  year={1989},
-  publisher={Addison-Wesley},
-  address={Reading, MA},
-  isbn={9780201157673}
+  title     = {Genetic Algorithms in Search, Optimization, and Machine Learning},
+  author    = {Goldberg, David E.},
+  year      = {1989},
+  publisher = {Addison-Wesley},
+  address   = {Reading, MA},
+  isbn      = {9780201157673},
+  doi       = {10.5860/choice.27-0936}
 }
 
 @article{goldberg1991comparative,
-  title={A Comparative Analysis of Selection Schemes Used in Genetic Algorithms},
-  author={Goldberg, David E. and Deb, Kalyanmoy},
-  journal={Foundations of Genetic Algorithms},
-  volume={1},
-  pages={69--93},
-  year={1991},
-  publisher={Elsevier}
+  title     = {A Comparative Analysis of Selection Schemes Used in Genetic Algorithms},
+  author    = {Goldberg, David E. and Deb, Kalyanmoy},
+  journal   = {Foundations of Genetic Algorithms},
+  volume    = {1},
+  pages     = {69--93},
+  year      = {1991},
+  publisher = {Elsevier},
+  doi       = {10.1016/b978-0-08-050684-5.50008-2}
 }
 
 @inproceedings{manderick1989genetic,
-  title={The Genetic Algorithm and the Structure of the Fitness Landscape},
-  author={Manderick, Bernard and Spiessens, Peter},
-  booktitle={Proceedings of the 4th International Conference on Genetic Algorithms},
-  pages={143--150},
-  year={1989},
-  organization={Morgan Kaufmann Publishers Inc.}
+  title       = {The Genetic Algorithm and the Structure of the Fitness Landscape},
+  author      = {Manderick, Bernard and Spiessens, Peter},
+  booktitle   = {Proceedings of the 4th International Conference on Genetic Algorithms},
+  pages       = {143--150},
+  year        = {1989},
+  organization = {Morgan Kaufmann Publishers Inc.}
+  % No DOI
 }
 
 @book{michalewicz1996genetic,
-  title={Genetic Algorithms + Data Structures = Evolution Programs},
-  author={Michalewicz, Zbigniew},
-  year={1996},
-  publisher={Springer},
-  edition={3rd},
-  address={Berlin, Heidelberg},
-  isbn={9783540606765}
+  title     = {Genetic Algorithms + Data Structures = Evolution Programs},
+  author    = {Michalewicz, Zbigniew},
+  year      = {1996},
+  publisher = {Springer},
+  edition   = {3rd},
+  address   = {Berlin, Heidelberg},
+  isbn      = {9783540606765},
+  doi       = {10.1007/978-3-662-03315-9}
 }
 
 @book{eiben2003introduction,
-  title={Introduction to Evolutionary Computing},
-  author={Eiben, Agoston E. and Smith, James E.},
-  year={2003},
-  publisher={Springer},
-  address={Berlin, Heidelberg},
-  isbn={9783540401841}
+  title     = {Introduction to Evolutionary Computing},
+  author    = {Eiben, Agoston E. and Smith, James E.},
+  year      = {2003},
+  publisher = {Springer},
+  address   = {Berlin, Heidelberg},
+  isbn      = {9783540401841},
+  doi       = {10.1007/978-3-662-44874-8}
 }
 
 @inproceedings{whitley1993cellular,
-  title={Cellular genetic algorithms},
-  author={Whitley, Darrell},
-  booktitle={Proceedings of the Fifth International Conference on Genetic Algorithms (ICGA)},
-  editor={Forrest, Stephanie},
-  pages={658},
-  year={1993},
-  publisher={Morgan Kaufmann},
-  address={California, CA, USA}
+  title     = {Cellular genetic algorithms},
+  author    = {Whitley, Darrell},
+  booktitle = {Proceedings of the Fifth International Conference on Genetic Algorithms (ICGA)},
+  editor    = {Forrest, Stephanie},
+  pages     = {658},
+  year      = {1993},
+  publisher = {Morgan Kaufmann},
+  address   = {California, CA, USA}
+  % No DOI
 }
 
 @book{alba2008cellular,
-  title={Cellular Genetic Algorithms},
-  author={Alba, Enrique and Dorronsoro, Bernab{\'e}},
-  series={Operations Research/Computer Science Interfaces Series},
-  year={2008},
-  publisher={Springer},
-  address={US},
-  isbn={978-0-387-77609-5}
+  title     = {Cellular Genetic Algorithms},
+  author    = {Alba, Enrique and Dorronsoro, Bernab{\'e}},
+  series    = {Operations Research/Computer Science Interfaces Series},
+  year      = {2008},
+  publisher = {Springer},
+  address   = {US},
+  isbn      = {978-0-387-77609-5}
+  % No DOI
 }
 
 @article{satman2019alpha_male_ga,
@@ -103,7 +113,8 @@ @article{satman2019alpha_male_ga
   volume    = {21},
   number    = {1},
   pages     = {55--82},
-  year      = {2019}
+  year      = {2019},
+  doi       = {10.26468/trakyasobed.452095}
 }
 
 @article{satman2020machine_coded_cga,
@@ -113,5 +124,6 @@ @article{satman2020machine_coded_cga
   volume    = {8},
   number    = {1},
   pages     = {43--58},
-  year      = {2020}
+  year      = {2020},
+  doi       = {10.17093/alphanumeric.576919}
 }