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Martynov A.V., Korshunova T.A., Grintsov V.A. (2007). Opisthobranch molluscs of the Northern Black Sea. I. Short history of studies and the first record of a non-indigenous nudibranch species Trinchesia perca (Er. Marcus, 1958) (Nudibranchia: Tergipedidae). Ruthenica, Russian Malacological Journal. 17(1-2): 43-54.
Martynov A.V., Korshunova T.A., Grintsov V.A. (2007). Opisthobranch molluscs of the Northern Black Sea. I. Short history of studies and the first record of a non-indigenous nudibranch species Trinchesia perca (Er. Marcus, 1958) (Nudibranchia: Tergipedidae). Ruthenica, Russian Malacological Journal. 17(1-2): 43-54.