HARRIS, T. M. A reconstruction of Equisetum columnare and notes on its elator bearing spores. Journal of Palaeosciences, [S. l.], v. 25, n. 1-3, p. 120–125, 1976. DOI: 10.54991/jop.1976.1003. Disponível em: https://jpsonline.co.in/index.php/jop/article/view/1003. Acesso em: 17 may. 2024.