KURHANSKYI, V., and V. RIABUKHA. “THE LITHOTYPE DETERMINATION IN THE LOWER CARBON ROCKS OF THE LOKHVITSKA STRUCTURAL TECTONIC ZONE (THE DNIEPER-DONETS DEPRESSION) ON THE BASIS OF RELATION PП=F(KП)”. Visnyk of Taras Shevchenko National University of Kyiv. Geology, no. 38-39, July 2006, pp. 106-9, https://geology.bulletin.knu.ua/article/view/3336.