Degefa, Shambel Tadesse, Oluwole Daniel Makinde, and Tamirat Temesgen Dufera. “Mathematical Model of Potato Virus Y Disease Spread With Optimal Control”. Mathematical Modelling and Analysis 27, no. 3 (August 12, 2022): 408–428. Accessed December 2, 2024. https://mma.vgtu.lt/index.php/MMA/article/view/15077.