Bakke, T. A.; Jansen, P. A.; Brabrand, Åge. Susceptibility and Resistance of Brook Lamprey, Lampetra Planeri (Bloch), Roach, Rutilus Rutilus (L.) and Perch, Perca Fluviatilis L. To Gyrodactylus Salaris Malmberg (Monogenea). Fauna Norv. 1990, 11, 23-26.