SOBOLEV SINFIDA OPERATOR QATNASHGAN TENGLAMALAR UCHUN BOSHLANGʻICH-CHEGARAVIY MASALALAR. INTERNATIONAL JOURNAL OF RECENTLY SCIENTIFIC RESEARCHER’S THEORY, [S. l.], v. 2, n. 9, p. 109–116, 2024. Disponível em: https://uzresearchers.com/index.php/ijrs/article/view/4017. Acesso em: 15 nov. 2024.