HOSKINS, J.; CROSS, A. The Petrifaction Flora of the Devonian-Mississippian Black Shale. Journal of Palaeosciences, [S. l.], v. 1, p. 215–238, 1952. DOI: 10.54991/jop.1952.386. Disponível em: https://jpsonline.co.in/index.php/jop/article/view/386. Acesso em: 14 may. 2024.