1. Appeltans , W. Bouchet , P. Boxshall , G.A. Fauchald , K. Gordon , D. Hoeksema , B.W. Poore , G.C.B. van Soest , R.W.M. Stöhr , S. Walter , T.C. Costello , M.J. 2009 World register of marine species http://www.marinespecies.org
2. Diversity of organisms: how much do we know?;Barnes;American Zoologist,1989
3. Predicting unknown species numbers using discovery curves;Bebber;Proceedings of the Royal Society B: Biological Sciences,2007
4. Bisby , F.A. Roskov , Y.R. Orrell , T.M. Nicolson , D. Paglinawan , L.E. Bailly , N. Kirk , P.M. Bourgoin , T. Baillargeon , G. 2009 Species 2000 & ITIS Catalogue of Life: 2009 annual checklist Species 2000
5. Inventorying the molluscan diversity of the world. What is our rate of progress?;Bouchet;The Veliger,1997