Hayroyan, S. H., et al. “INFLUENCE OF INITIAL DENSITY OF CEMENT SOILS SKELETON ON INTENSITY OF HARDENING PROCESS”. Proceedings of the YSU C: Geological and Geographical Sciences, vol. 43, no. 2 (219), July 2009, pp. 22-27, doi:10.46991/PYSU:C/2009.43.2.022.