1. R. D., Barnes: Invertebrate ZoologySaunders College, Philadelphia., 1980.
2. A., Beall and A. G., Fischer: SedimentologyIn Initial Reports of the Deep Sea Drilling Program, 1: 521–593, US Government Printing Office, Washington., 1963.
3. J. A., Bergen: Nannofossil Biostratigraphy at Site 585, East Mariana BasinIn Initial Reports of the Deep Sea Drilling Project, 89: 285–296US Government Printing Office, Washington., 1985.
4. N. J., Berrill: The tunicata, with an account of British species, Proceedings of the Royal Society of London, 133, 1-354, 1950.
5. H. M. D. De, Blainville: Manuel de Malacologie el de ConchologieLibraire FGLavrault Libraire, Paris., 1825.