Muhammademinov Alijon Azizjon o‘g‘li and Saidova Nigora Komiljonovna (2024) “STEFFENSEN (EYTKEN-STEFFENSEN) USULI ”, Ta’lim innovatsiyasi va integratsiyasi , 20(3), pp. 97–100. Available at: http://web-journal.ru/index.php/ilmiy/article/view/4864 (Accessed: 6 October 2024).