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, [S. l.], n. 1(25), p. 40–44, 2019. Disponível em: https://pvntsh.nung.edu.ua/index.php/number/article/view/203. Acesso em: 6 dec. 2025.