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Spermiogenesis and sperm ultrastructure in the monocotylid monogenean Calicotyle kroyeri. International Journal for Parasitology, 21(1), 57–63
DOI: 10.1016/0020-7519(91)90120-V
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Spermiogenesis and sperm ultrastructure in the monogenean parasite Acanthocotyle lobianchi. International Journal for Parasitology, 20(6), 747–753
DOI: 10.1016/0020-7519(90)90008-B