[Parastratigraphic groups of flora and fauna of the Triassic. Marine organic remains. The stratigraphic significance of Triassic Radiolaria.] Trudy Vsesoyuznyi Nauchno-Issledovatel'skii Geologicheskii Institut A P Karpinskogo, 334 1986: 9-30, 226-229. 23 [Zoological Record Volume 125]