SOBOLEV SINFIDA OPERATOR QATNASHGAN TENGLAMALAR UCHUN BOSHLANGʻICH-CHEGARAVIY MASALALAR. IJRS [Internet]. 2024 Sep. 30 [cited 2024 Nov. 15];2(9):109-16. Available from: https://uzresearchers.com/index.php/ijrs/article/view/4017