Saperas, N. & Chiva, M. & Bols, N.C. & Kulak, D. & Kasinsky, H.E. (1993)
Sperm-Specific Basic Proteins in the Holocephalan Fish Hydrolagus colliei (Chondrichthyes, Chimaeriformes) and Comparison with Protamines from an Elasmobranch. Biological Bulletin, 185, 186–196

Stanley, H.P. & Kasinsky, H.E. & Bols, N.C. (1984)
Meiotic chromatin diminution in a vertebrate, the holocephalan fish Hydrolagus collie (Chondrichthyes, Holocephali). Tissue and Cell, 16(2), 203–215
DOI: 10.1016/0040-8166(84)90045-4

Bols, N.C. & Kasinsky, H.E. (1976)
On the diversity of sperm histones in the vertebrates: II. A cytochemical study of the basic protein transitions during spermiogenesis in the cartilaginous fish Hydrolagus colliei. Journal of Experimental Zoology, 198(1), 109–113
DOI: 10.1002/jez.1401980112