GREGUSS, P. The relationships Cycadales on the basis of their xylotomy, branching and leaf epidermis. Journal of Palaeosciences, [S. l.], v. 14, n. (1-3), p. 94–101, 1965. DOI: 10.54991/jop.1965.721. Disponível em: https://jpsonline.co.in/index.php/jop/article/view/721. Acesso em: 14 may. 2024.