Abdel-Gawad H, Abdel-Gawad AH. Mathematical analysis of the new α - difference operator with an application to prey-predator model with harvesting. Quadratic invariant. Ann Math Phys [Internet]. 2024 Feb. 20 [cited 2025 Jan. 10];7(1):054-63. Available from: https://www.peertechzpublications.us/amp/article/view/AMP-7-206