Jennings et al, 2010

R.M. Jennings, Bucklin, A., Ossenbrügger, H., R.R.Hopcroft. 2010. Species diversity of planktonic gastropods (Pteropoda and Heteropoda) from six ocean regions based on DNA barcode analysis. Deep Sea Research Part II: Topical Studies in Oceanography, Volume 57, Issues 24–26, Pages 2199-2210. http://www.academia.edu/download/52794415/Species_diversity_of_planktonic_gastropo20170424-28983-p6tlb6.pdf