Chavali, Rama Vara Prasad, and Hari Prasad Reddy P. “Volume Change Behavior of Phosphogypsum Treated Clayey Soils Contaminated With Inorganic Acids – a Micro Level Study”. Journal of Environmental Engineering and Landscape Management, vol. 26, no. 1, Mar. 2018, pp. 8-18, https://doi.org/10.3846/16486897.2017.1331168.