S. Reguant, “A contribution to knowledge of the development of marine life during the Permian and Triassic through the analysis of life histories of genera”, JIGE, vol. 33, no. 2, pp. 173–190, Jan. 2007, Accessed: Nov. 05, 2024. Available: https://revistas.ucm.es/index.php/JIGE/article/view/JIGE0707210173A