Echiura

Gould-Somero, M, Holland LZ.  1975.  Fine-structural Investigation of Insemination Response in Urechis caupo . Developmental Biology . 46(2):358-369.
Gould-Somero, M, Holland LZ, Paul M.  1977.  Cytochalasin-B Inhibits Sperm Penetration into eggs of Urechis caupo (Echiura). Developmental Biology. 58(1):11-22.
Jaffe, LA, Gould-Somero M, Holland LZ.  1979.  Ionic Mechanism of the Fertilization Potential of the Marine Worm, Urechis caupo (Echiura) . Journal of General Physiology . 73(4):469-492.