Spermatozoa and Phylogeny. In W.C. Hamlett (Ed.), Reproductive biology and phylogeny of chondrichthyes: sharks, rays and chimaeras, Vol. 3 (pp. 201–236). Science Publishers, Endfield, USA
Phylogeny of the Monopisthocotylea and Polyopisthocotylea (Platyhelminthes) inferred from 28S rDNA sequences. International Journal for Parasitology, 30(2), 171–185
DOI: 10.1016/S0020-7519(99)00197-6