Abdallah, A. S., E. S. Bushara, and K. M. Abdallah. “Contamination of Soil and Vegetables by Heavy Metals and the Associated Health Risks in Khartoum North”. European Journal of Science, Innovation and Technology, Vol. 2, no. 5, Nov. 2022, pp. 14-21, https://ejsit-journal.com/index.php/ejsit/article/view/133.