Deepak Bishla, Prof. Dr. Brijesh Kumar. “A Review on Issues, Challenges, and Solutions of Scalability and Optimization Problems in Software Defined Networks”. International Journal of Advanced Science and Technology 29, no. 08 (June 1, 2020): 2307 - 2313. Accessed September 26, 2021. https://sersc.org/journals/index.php/IJAST/article/view/23396.