Muhammadjonov, J. J. o‘g‘li, O. Q. o‘gli Asranov, and K. S. qizi O‘rinboyeva. “QUYOSH SISTEMASINING BARQARORLIK MUAMMOSI”. Educational Research in Universal Sciences, vol. 2, no. 14 SPECIAL, Nov. 2023, pp. 923-8, http://erus.uz/index.php/er/article/view/4556.