1. (1959 ). (Ananiev, A. R.) . (The most important localities of Devonian floras in the Saian-Altai Mountain District).).
2. (1968 ). (Ananiev, A. R. & Stepanov, S. A. (1968).) 202, 30 -46 . (Discovery of the sporangial organs ofPsilophyton princepsDawson emend. Halle from the Lower Devonian of the Southern Minusinsk Trough (Western Siberia)).
3. Evolutionary Trends in Early Vascular Plants
4. Psilophyton forbesii, a New Devonian Plant from Northern Maine