Шегда, Любов Михайлівна. “NECESSARY CONDITION FOR THE EXISTENCE OF SOLUTIONS OF A WEAKLY NONLINEAR BOUNDARY-VALUE PROBLEM WITH IMPULSIVE ACTION”. PRECARPATHIAN BULLETIN OF THE SHEVCHENKO SCIENTIFIC SOCIETY. Number, no. 1(25) (March 6, 2019): 40–44. Accessed December 6, 2025. https://pvntsh.nung.edu.ua/index.php/number/article/view/203.