R. . Smith, «Early Oligocene terrestrial vertebrates from Belgium (Borgloon Formation, MP 21): catalog and interpretation of recent data», Coloq. paleontol., pp. 647–657, ene. 2003, Accedido: dic. 07, 2025. Disponible en: https://revistas.ucm.es/index.php/COPA/article/view/COPA0303220647A