Гургула, С. І., & Перкатюк, І. Й. (2019). ABOUT THE SECOND LIAPOUNOV’S METHOD IN SYSTEMS WITH IMPULSIVE ACTION. PRECARPATHIAN BULLETIN OF THE SHEVCHENKO SCIENTIFIC SOCIETY. Number, (1(1), 9–15. Retrieved from https://pvntsh.nung.edu.ua/index.php/number/article/view/336