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Author - title
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Year
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| details | Early Triassic | Late Triassic | USSR(Komi ASSR) | Chalyshev,V.I. et al. Biostratigraphy of the Triassic of the Pechorsk District. | 1966 |
| details | Early Jurassic | USSR(Mangyshlak ASSR) | Amanniyazov,K.N. et al. New data on the study of spore-pollen complexes of Mesozoic deposits of Manghshlak Peninsula | 1990 |