M. Koorapetse, and P. Kaelo. “A Derivative-Free Conjugate Gradient Projection Method Based on the Memoryless BFGS Update”. Malaya Journal of Matematik 8, no. 02 (April 1, 2020): 502–509. Accessed December 3, 2024. https://www.malayajournal.org/index.php/mjm/article/view/1441.