O. M.  Amin, Heckmann, R. A., Halajian, A., and El-Naggar, A. M., ?The morphology of an unique population of Corynosoma strumosum (Acanthocephala, Polymorphidae) from the Caspian seal, Pusa caspica, in the land-locked Caspian Sea using SEM, with special notes on histopathology?, Acta ParasitologicaActa Parasitol., vol. 56, no. 4, pp. 438 - 445, 2011.