Аршинніков, Д.І. and Свідерський, В.А. 2015. The study of physicochemical properties of the sedimentary chalk surface of domestic deposits. Eastern-European Journal of Enterprise Technologies. 4, 6(76) (Aug. 2015), 17–22. DOI:https://doi.org/10.15587/1729-4061.2015.47861.