Monge-Nájera, Julián. “Reproductive Trends, Habitat Typeand Body Characteristcs . In Velvet Worms (Onychophora)”. Revista de Biología Tropical 42, no. 3 (December 1, 1994): 611–622. Accessed July 17, 2024. https://revistas.ucr.ac.cr/index.php/rbt/article/view/23266.