Hiep, T.X., Truong, N.X., Dung, N.V. and Chinh, V.V. 2017. Production of dicalcium phosphate from Lao Cai second grade apatite ore leached by dilute hydrochloric acid. Vietnam Journal of Science and Technology. 55, 2 (Apr. 2017), 209–219. DOI:https://doi.org/10.15625/0866-708X/55/2/8312.