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Evdonin, L. A. (1970). The proboscis apparatus in the family Polycystidae (Turbellaria, Neorhabdocoela, Kalyptorhynchia). In: "Studies in the evolutionary morphology of invertebrates". Ed. A.V. Ivanov. State University Leningrad. 5–53.
Evdonin, L. A. (1970). The proboscis apparatus in the family Polycystidae (Turbellaria, Neorhabdocoela, Kalyptorhynchia). In: "Studies in the evolutionary morphology of invertebrates". Ed. A.V. Ivanov. State University Leningrad. 5–53.
