Sánchez-Ferreira, A., Rincón-Barón, E.J. and Rueda-Solano, L.A. 2021. Histology and structure of the testicles in three species of Atelopus frogs (Anura: Bufonidae) endemic to the Sierra Nevada de Santa Marta, Colombia. Revista de Biología Tropical. 69, 3 (Aug. 2021), 811–828. DOI:https://doi.org/10.15517/rbt.v69i3.44727.