Xolboyev , N. A. o‘g‘li. “MAKSIMAL NOCHIZIQLI INTEGRO-DIFFERENSIAL TENGLAMALAR SISTEMASI UCHUN CHEGARAVIY MASALA”. Educational Research in Universal Sciences, vol. 2, no. 2, Mar. 2023, pp. 269-73, http://erus.uz/index.php/er/article/view/1725.