Дмитриев, Д. А., Савко, А. Д., Куролап, С. А., Калаев, В. Н. and Иванов, Д. А. (2018) “Mineral-raw material base of non-metallic mineral resources of central black earth region and its rational use. Article 2. the model of rational using of mineral-raw material base of non-metals”, Proceedings of Voronezh State University. Series: Geology, 0(4), pp. 39-56. doi: 10.17308/geology.2018.4/1646.