Cutler, N. J., E. B. Cutler, and J. A. Vargas. “Peanut Worms (Phylum Sipuncula) from Costa Rica”. Revista De Biología Tropical, vol. 40, no. 1, Aug. 2024, pp. 153-8, https://revistas.ucr.ac.cr/index.php/rbt/article/view/61511.