ГУЛЬКА, Степан Степанович. THE METHOD OF PART MIDDLING IN THE INTEGRAL- DIFFERENTIAL SYSTEMS WITH DOUBLE IMPULSIVE ACTION. PRECARPATHIAN BULLETIN OF THE SHEVCHENKO SCIENTIFIC SOCIETY. Number, [S. l.], n. 1(5), p. 20–23, 2019. Disponível em: https://pvntsh.nung.edu.ua/index.php/number/article/view/306. Acesso em: 6 dec. 2025.