Lindquist, E., Redmer, M., & Brantner, E. (2012). Annular bone growth in phalanges of five Neotropical Harlequin Frogs (Anura: Bufonidae: Atelopus). Phyllomedusa: Journal of Herpetology, 11(2), 117-124. https://doi.org/10.11606/issn.2316-9079.v11i2p117-124