JONGMANS, W. The female fructification of Sphenopteris Hoeninghausi and the (supposed) relation of this species with Crossotheca. Journal of Palaeosciences, [S. l.], v. 1, p. 267–276, 1952. DOI: 10.54991/jop.1952.388. Disponível em: https://jpsonline.co.in/index.php/jop/article/view/388. Acesso em: 15 may. 2024.