On a $(\omega ,c)-$periodic solution for an impulsive system of second-order differential equation with product of two nonlinear functions and mixed maxima: On a $(\omega ,c)-$periodic solution for an impulsive system of second-order differential equation. UJMCS [Internet]. 2025 May 1 [cited 2025 Dec. 6];1(1):20-32. Available from: https://ujmcs.tstu.uz/index.php/ujmcs/article/view/6