@article {1742,
	title = {A new aberrant ascidian Oligotrema laethmobia sp. n., and taxonomic rank of the group Sorberacea},
	journal = {Zoologicheskii Zhurnal},
	volume = {72},
	year = {1993},
	pages = {104-115},
	author = {Ivanov, A.V.}
}
