SOBOLEV SINFIDA OPERATOR QATNASHGAN TENGLAMALAR UCHUN BOSHLANGʻICH-CHEGARAVIY MASALALAR. IJRS [Internet]. 2024 Sep. 30 [cited 2026 Jun. 19];2(9):109-16. Available from: https://www.uzresearchers.com/index.php/ijrs/article/view/4017