Kazragis, Algimantas. “High‐temperature Decontamination and Utilization of Phosphogypsum”. Journal of Environmental Engineering and Landscape Management 12, no. 4 (December 31, 2004): 138-145. Accessed December 3, 2022. https://journals.vilniustech.lt/index.php/JEELM/article/view/8105.