Haydarov , A., and S. A. o‘g‘li Rustamov. “ELLIPTIK TURDAGI TENGLAMALAR UCHUN MANBA’NI ANIQLASH TESKARI MASALASI YECHIMINING YAGONALIGI VA TURG‘UNLIGI”. GOLDEN BRAIN, vol. 1, no. 13, May 2023, pp. 250-5, https://researchedu.org/index.php/goldenbrain/article/view/3498.