1. Sipunculida;Baltzer,1934
2. The respiratory metabolism of Dendrostomum cymodoceae;Edmunds;Aust. J. Mar. Freshw. Res.,1957
3. The sipunculid worms of California and Baja California;Fisher,1952
4. Recherches sur les Hémérythrines;Florkin;Arch. Int. Physiol.,1933
5. The Invertebrates: Smaller Coelomate Groups;Hyman,1959