Xonimqulova Zamira. “BOSHLANG‘ICH SINFLARDA MIQDOR TUSHUNCHASINI O‘RGATISH VAQT SISTEMASI MISOLIDA”. Ustozlar Uchun, vol. 44, no. 7, June 2023, pp. 90-92, http://pedagoglar.uz/index.php/01/article/view/4828.