^Cutler, Edward B. (1994): The Sipuncula: their systematic, biology and evolution. Cornell University Press. 406p ISBN 0-8014-2843-2
^Cutler, Edward B., Cutler, Norma J. & Gibbs, Peter E. (1985): A revision of the Golfingia subgerera Golfingiela, Stephen, 1964, and Siphonoides, Murina, 1967 (Sipuncula). Proceedings of the Biological Society of Washington96(4):669-674.
^Cutler, Edward B. & Cutler, Norma J. (1987): Revision of the genus Golfingia (Sipuncula: Golfingiidae). Proceedings of the Biological Society of Washington100(4):735-761.
^Cutler, Edward B. & Cutler, Norma J. (1985): A revision of the genera Phascolion Theel, and Onchnesoma Koren and Danielssen (Sipuncula). Proceedings of the Biological Society of Washington98(4):809-850.
^Cutler, Edward B. & Cutler, Norma J. (1988): A revision of the genus Themistes. (Sipuncula). Proceedings of the Biological Society of Washington101(4):741-766.
