Tang, H., Y. Qiao, X. Dai, F. Tan, and Q. Li. “Preparation of FePO4x2H2O from LiFePO4 Mixed With LiNixCoyMn1–x–yO2 Waste Material”. Journal of the Serbian Chemical Society, vol. 85, no. 5, May 2020, pp. 671-85, doi:10.2298/JSC190916005T.