Elloumi, Nada, Dalel Belhaj, Boutheina Jerbi, Mohamed Zouari, and Monem Kallel. “Effects of Sewage Sludge on Bio-Accumulation of Heavy Metals in Tomato Seedlings”. Spanish Journal of Agricultural Research 14, no. 4 (January 20, 2017): e0807. Accessed April 28, 2024. https://sjar.revistas.csic.es/index.php/sjar/article/view/9210.