Karling, T.G., 1953. Cytocystis clitellatus n. gen., n.sp., ein neuer Eukalyptorhynchien-Typus (Turbellaria). Arkiv Zool. Stockholm (11) 4 (28): 493-505.
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Bashiruddin, M. & Karling, T.G., 1970. A new entocommensal turbellarian (fam. Pterastricolidae) from the sea star Astropecten irregularis. Z. Morphol. Tiere 67: 16-28.
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Karling, T.G. & Nilsson, A.-M., 1974. Further studies on the genus Hypoblepharina Böhmig (Turbellaria, Dalyellioida), with description of H. serrifera sp. n. Zool. Scr. 3: 59-63.
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