[Lymnaeids of the subgenus Omphiscola from the Neogene of south Ukraine.] Vyalov, O.S.[Ed]. Paleontologicheskie i biostratigraficheskie issledovaniya pri geologicheskoi s'emke na Ukraine: sbornik nauchnykh trudov. [Palaeontologic and biostratigraphic research in the geological survey of the Ukraine: collected scientific papers.], Naukova Dumka, Kiev, 1990: 40-46. Chapter pagination: 109-120. 117 [Zoological Record Volume 128]