Xalilov Qobiljon Solijonovich and Abdujabborov Abduxalim Abdug‘oppor o‘g‘li, “TIP O‘ZGARISH CHIZIG‘I SILLIQ BO‘LMAGAN PARABOLO-GIPERBOLIK TENGLAMA UCHUN BIRINCHI NOLOKAL MASALA YECHIMINING YAGONALIGI”, Euro. Jour. of Inte. Res. and Dev., vol. 15, pp. 220–228, May 2023.