BRISTOW, G.A. (1992)
On the distribution, ecology and evolution of Gyrocotyle urna, Gyrocotyle confusa and Gyrocotyle nybelini (Cercomeromorpha: Gyrocotylidea) and their host Chimaera monstrosa (Holocephalida: Chimaeridae) in Norwegian waters, with a review of the species question. Sarsia, 77 (2): 119–124
DOI: 10.1080/00364827.1992.10413497