BUTTERWORTH, M. The distribution of Densospores. Journal of Palaeosciences, [S. l.], v. 15, n. (1-3), p. 16–28, 1966. DOI: 10.54991/jop.1966.742. Disponível em: https://jpsonline.co.in/index.php/jop/article/view/742. Acesso em: 22 feb. 2025.