Saadaoui, Wassim, Khaoula Mokrani, and Neji Tarchoun. “Assessment of Lead, Copper and Cadmium Tolerance by Four Vegetable Species”. American Scientific Research Journal for Engineering, Technology, and Sciences 47, no. 1 (October 2, 2018): 76–87. Accessed May 3, 2024. https://asrjetsjournal.org/index.php/American_Scientific_Journal/article/view/1581.