Fedorova, 1989
From dinoflaj3
Fedorova, V.A., 1989: New dinoflagellate cyst species and prasinophytes from boreal Upper Jurassic-Lower Cretaceous deposits on the territory of the USSR. In: Phytostratigraphy and Morphology of Ancient Plant Spores from Oil-Gas Bearing Provinces of the USSR, p.69-80; Nauchno-Issledovatelskii Geologorazvedochnyi Institut, (VNIGRI), Leningrad, USSR.