A. K. Salam, V. Vivin, and S. Yusnaini, “Decrease in Activity of Acid Phosphatase in Root-Zones of Several Plants Driven by Lime and Lead-Containing Industrial Waste Treatments”, J. Il. Tan. Lingk., vol. 2, no. 1, pp. 1–6, Oct. 2009, doi: 10.29244/jitl.2.1.1-6.