KULKARNI, S. Studies in the Glossopteris flora of India - 40. Sphnopteris polymorpha Feistm. (1881) emend. from the barakar stage of South Karanpura coalfield, Bihar, India. Journal of Palaeosciences, [S. l.], v. 18, n. 1-3, p. 208–211, 1969. DOI: 10.54991/jop.1969.836. Disponível em: https://jpsonline.co.in/index.php/jop/article/view/836. Acesso em: 4 nov. 2024.