Wagner, Robert H. «Laveineopteris Polymorpha FROM THE Lower Westphalian (Langsettian) “fern ledges” at Saint John, New Brunswick, Canada, and Comparison With Laveineopteris Hollandica from Europe». Spanish Journal of Palaeontology 23, no. 2 (febrero 14, 2021): 139–156. Accedido noviembre 10, 2024. https://pasquin.uv.es/index.php/sjpalaeontology/article/view/20402.