Barquero-González, J. P., V. J. Acosta-Chaves, M. L. Sotela, F. Villalobos Brenes, and B. Morera-Brenes. “Photographic Evidence of Undescribed Species of Velvet Worms (Onychophora: Peripatidae) from Costa Rica”. UNED Research Journal, vol. 8, no. 2, Oct. 2016, pp. 139-47, doi:10.22458/urj.v8i2.1553.