КАЧМАР, Юрій Дмитрович. TECHNIQUE OF DESIGN HYDRO-SAND-STREAM PERFORATION THROUGH SEVERAL COLUMNS. PRECARPATHIAN BULLETIN OF THE SHEVCHENKO SCIENTIFIC SOCIETY. Number, [S. l.], n. 1(5), p. 256–262, 2019. Disponível em: https://www.pvntsh.nung.edu.ua/index.php/number/article/view/325. Acesso em: 20 dec. 2025.