U. Karabalin, F. Serikov, O. Lyzlov, BachilovaТ., E. Yakupova, and A. Yeleukulova, “Influence of processing of the limestone-coquina with solutions of polysulfide calcium on its durability.”, Chemical Bulletin of Kazakh National University, vol. 61, no. 1, pp. 66-70, Mar. 2011.