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2. Das Paralabialorgan der Ophryoscoleciden;Bretschneider;Proc. Acad. Sci. Amsterdam,1962
3. A study in the light and electron microscope of the extruded peristome and related structures of the rumen ciliate Entodiniutn caudutum;Coleman;Tissue & Cell,1971
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5. Nouveaux infusoires de la famille des Ophryoscolecides parasites d'antilopes africaines;Dogiel;Ann. Parasitol. hum. Comp.,1925