https://doi.org/10.1111/j.1558-5646.2009.00611.x
Arntzen, J. W., Jehle, R., Bosch, J., Miaud, C., Tejedo, M., Lizana, M.,
… Gil, E. R. (2004). Triturus marmoratus . IUCN 2006. 2006
IUCN red list of threatened species. Retrieved from:https://www.iucnredlist.org/
Arntzen, J. W., Wielstra, B., & Wallis, G. P. (2014). The modality of
nine Triturus newt hybrid zones assessed with nuclear,
mitochondrial and morphological data. Biological Journal of the
Linnean Society , 113, 604–622.https://doi.org/10.1111/bij.12358
Avise, J. C. (2004). What is the field of biogeography, and where is it
going? Taxon , 53, 893-898.