G. A. Mun, D. Z. Utkelov, D. S. Kazybayeva, A. O. Saduova, R. A. Mangazbayeva, and E. Negim, “Synthesis and study of phospate-polyalkyleneoxide flotation reagent for oxidized minerals”, IJBCh, vol. 7, no. 2, pp. 61–64, Dec. 2014.