McNamara, M. E.; Orr, P. J.; Kearns, S. L.; Alcalá, L.; Anadón, P.; Peñalver-Mollá, E. 2009. Exceptionally preserved tadpoles from the Miocene of Libros, Spain: ecomorphological reconstruction and the impact of ontogeny upon taphonomy. Lethaia. 43 (3): 290–306. doi:10.1111/j.1502-3931.2009.00192.x. hdl:10261/141680
McNamara, M. E.; Orr, P. J.; Kearns, S. L.; Alcalá, L.; Anadón, P.; Peñalver-Mollá, E. 2009. Exceptionally preserved tadpoles from the Miocene of Libros, Spain: ecomorphological reconstruction and the impact of ontogeny upon taphonomy. Lethaia. 43 (3): 290–306. doi:10.1111/j.1502-3931.2009.00192.x. hdl:10261/141680