Aveen Faidhalla Jalal, Hawraz Sami Khalid, Iman Tayib Yasin, and Mhabat Rashid Xanamir, “Estimation of Some Metals in Children’s Colorful Modeling Clay Sold in the Markets of Erbil City, Kurdistan Region, Iraq”, ZJPAS, vol. 32, no. 5, pp. 134–145, Oct. 2020.