Khavaza, T., R. Tokpayev, Z. Ibraimov, A. Atchabarova, K. Kishibayev, and M. Nauryzbayev. “Study of Cerium and Neodymium Leaching from Kazakhstan Phosphogypsum”. International Journal of Biology and Chemistry, vol. 14, no. 2, Dec. 2021, pp. 93-100, doi:10.26577/ijbch.2021.v14.i2.013.