W. A.  Green, ?Phascolosoma lurco: A semi-terrestrial sipunculan?, in Proceedings of the international symposium on the biology of the Sipuncula and Echiura, M. E.  Rice and Todorovic, M., Eds. Belgrade: Naucno Delo Press, 1975, pp. 267-280.

W. A.  Green, ?The annual reproductive cycle of Phascolosoma lurco (Sipuncula)?, in Proceedings of the international symposium on the biology of the Sipuncula and Echiura, M. E.  Rice and Todorovic, M., Eds. Belgrade: Naucno Delo Press, 1975, pp. 161-168.