Jan Willem Arntzen, Pedro Beja, Jaime Bosch, Miguel Tejedo, Miguel Lizana, Robert Jehle, Iñigo Martínez-Solano, Alfredo Salvador, Mario García-París, Ernesto Recuero Gil, Rafael Marquez, Paulo Sá-Sousa, Carmen Diaz Paniagua: Triturus pygmaeusIUCN Red List of Threatened Species. Version 2020-1. 2009. International Union for Conservation of Nature, IUCN, Iucnredlist.org. Viitattu 8.4.2020. (englanniksi)