R. . Matsumoto and S. E. . Evans, “Choristoderes and the freshwater assemblages of Laurasia”, JIGE, vol. 36, no. 2, pp. 253–274, Dec. 2010, Accessed: Nov. 21, 2024. Available: https://revistas.ucm.es/index.php/JIGE/article/view/JIGE1010220253A