O. M.  Amin and Redlin, M. J., ?The effect of host species on growth and variability of Echinorhynchus salmonis Müller, 1784 (Acanthocephala: Echinorhynchidae), with special reference to the status of the genus?, Systematic ParasitologySyst Parasitol, vol. 2, no. 1, pp. 9 - 20, 1980.