CHERNYKH, V. V.; CHUVASHOV, B. I.; DAVYDOV, V. I.; SCHIMTZ, M.; SNYDER, W. S. Usolka section (southern Urals, Russia): a potential candidate for GSSP to define the base of the Gzhelian Stage in the global chronostratigraphic scale . Geologija, [S. l.], v. 49, n. 2, p. 205–217, 2006. DOI: 10.5474/geologija.2006.015. Disponível em: https://www.geologija-revija.si/index.php/geologija/article/view/1006. Acesso em: 29 apr. 2024.