Poretskaya, E. S. 1974. [New echinoids from the Upper Oxfordian of the Kopetdag range and on the problem of classification and phylogeny of the disasterids]. Voprosy Stratigrafii 1, 85-91.
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Poretskaya, E. S.
1974
New echinoids from the Upper Oxfordian of the Kopetdag range and on the problem of classification and phylogeny of the disasterids