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Author - title
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Year
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| details | Toarcian | Aalenian | USSR(Tuvinskaya A.O.) | Timofeev,P.P. On the age and range of Jurassic Coal deposits of Tuvi | 1958 |
| details | Middle Jurassic | USSR(Tuvinskaya A.O.) | Timofeev,P.P. The age and subdivision of the Jurassic Coal-bearing deposits of Tuva. | 1958 | |
| original | Middle Jurassic | Early Cretaceous | USSR(Siberia) | Bolkhovitina,N.A. Atlas of spores and pollen from Jurassic and Lower Cretaceous deposits of the Vilyuysk Basin. | 1956 |