Walliser, Otto H. «The Bilbao Conference “Palaeontology and Evolution: Extinction Events”: A Big Step Forward in Understanding Exceptional Global Changes». Spanish Journal of Palaeontology 3, no. 2 (septiembre 2, 2022): 5–6. Accedido enero 10, 2025. https://pasquin.uv.es/index.php/sjpalaeontology/article/view/25154.