NAUGOLNYKH, S. V.; ZAVIALOVA, N. E. Densoisporites polaznaensis sp. nov. with comments on its relation to Viatcheslavia vorcutensis Zalessky. Journal of Palaeosciences, [S. l.], v. 53, n. (1-3), p. 21–33, 2004. DOI: 10.54991/jop.2004.205. Disponível em: https://www.jpsonline.co.in/index.php/jop/article/view/205. Acesso em: 8 may. 2024.