Sherzod Tashbulat, Nosir Saidmaxamadov, Avazbek Iskanderov, and Suyarov Shaxzod, “QORA METALL QOTISHMALARINI SUYUQLANTIRISH JARAYONIDA SHLAKLARNI QUYMANING SIFATIGA TA’SIRINI TADQIQ QILISH”, UZC, p. 53, Jun. 2024.