KAR, R. Morphologicals evolution of pteridophytic spores in relation to free-floating environment. Journal of Palaeosciences, [S. l.], v. 41, p. 128–131, 1992. DOI: 10.54991/jop.1992.1113. Disponível em: https://jpsonline.co.in/index.php/jop/article/view/1113. Acesso em: 3 may. 2024.