Erlanger, O. A. (1993). Greira gen. nov.—Drevneyshiy rod poristykh rinkhonellid [Greira gen. nov.—The most ancient genus of porous rhynchonelids]. Paleontologicheskii Zhurnal. vol.1: 118-122.
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Erlanger, O. A.
1993
<i>Greira</i> gen. nov.—Drevneyshiy rod poristykh rinkhonellid [<i>Greira</i> gen. nov.—The most ancient genus of porous rhynchonelids]