Bachurin Б. А. Geochemical features of the kerogen composition of salts of the Verkhnekamsky deposit. Problems of mineralogy, petrography and metallogeny. Scientific readings in memory of P.N. Chirvinsky, [S. l.], n. 25, p. 11–17, 2022. DOI: 10.17072/chirvinsky.2022.11. Disponível em: http://press.psu.ru/index.php/miner/article/view/5115. Acesso em: 19 may. 2024.