Muhammademinov Alijon Azizjon o‘g‘li, Saidova Nigora Komiljonovna. STEFFENSEN (EYTKEN-STEFFENSEN) USULI . ilmiy [Internet]. 2024 May 2 [cited 2025 Apr. 9];20(3):97-100. Available from: https://web-journal.ru/ilmiy/article/view/4864