Гургула СІ, Перкатюк ІЙ. ABOUT THE SECOND LIAPOUNOV’S METHOD IN SYSTEMS WITH IMPULSIVE ACTION. Number [Internet]. 2019 Mar. 8 [cited 2025 Dec. 6];(1(1):9-15. Available from: https://pvntsh.nung.edu.ua/index.php/number/article/view/336