Pawson, D. L., and D. J. Vance. “Rynkatorpa felderi, New Species, from a Bathyal Hydrocarbon Seep in the Northern Gulf of Mexico (Echinodermata: Holothuroidea: Apodida)”. Zootaxa, vol. 1050, no. 1, Sept. 2005, pp. 15–20, doi:10.11646/zootaxa.1050.1.2.