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Author - title
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| original | Early Tertiary | Japan(Hokkaido I.) | Tokunaga,S. Palynological study on Japanese Coal.Ii.Pollen stratigraphical investigations in the Coal Fields, Middle Hokkaido. | 1958 | |
| original | Eocene | Japan(Hokkaido I.) | Tokunaga,S. Fossil pollen and spore from the known coal seams in the Bibai area, Ishikari Coal Field, Hokkaido. | 1955 | |
| original | Tertiary | USSR(Caucasus) | Gladkova,A.N. Flora of Maikop deposits of northern Caucasus from data of spore-pollen analysis. (In: Palaeobotanical Symposium) | 1953 |