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==மேற்கோள்கள்==
Thomas, H. H. (1950). "Birbal Sahni. 1891-1949". Obituary Notices of Fellows of the Royal Society. 7 (19): 264. doi:10.1098/rsbm.1950.0017.
R. Cuneo, S. Archangelsky (1986). "Ferugliocladaceae, a new conifer family from the Permian of Gondwana". Review of Palaeobotany and Palynology. 51 (1–3): 3–30. doi:10.1016/0034-6667(87)90016-9. Retrieved 14 February 2012.
Rothwell, Gar W (1982). "New interpretations of the earliest conifers". Review of Palaeobotany and Palynology. 37 (1–2): 7–28. doi:10.1016/0034-6667(82)90035-5. Retrieved 14 February 2012.
A. Doyle, James; J. Donoghue, Michael (1986). "Seed plant phylogeny and the origin of angiosperms: An experimental cladistic approach". THE BOTANICAL REVIEW. 52 (4): 321–431. doi:10.1007/bf02861082. Retrieved 14 February 2012.
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Khanna, Sunita Khanna (2004). "The Man That Was" (PDF). Newsletter, Birbal Sahni Institute of Paleobotany. 7: 7.
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Sitholey, R.V. (1950). "(Sahni Memorial Volume) Paleobotany in India - VII. Professor Birbal Sahni 1891-1949". The Journal of the Indian Botanical Society. 29 (1): https://archive.org/stream/in.ernet.dli.2015.25379/2015.25379.The–Journal–Of–The–Indian–Botanical–Society–Vol–xxix–1950#page/n9/mode/1up.
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Scott, R.A. (1995). "Chester A. Arnold (1901–1977): Portrait of an American paleobotanist". In W., Culp Darrah. Historical perspective of early twentieth century Carboniferous paleobotany in North America. 185. Paul C. Lyons, Elsie Darrah Morey, Robert Herman Wagner. Geological Society of America. pp. 215–224. ISBN 978-0-8137-1185-0. Retrieved 6 September 2010.
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Sahni, M.R. (1952). "Birbal Sahni: A biographical sketch of his personal life" (PDF). Palaeobotanist. 1: 1–8.
Koshy, Jacob B. (17 May 2007). "Ashok Sahni: The man who placed India on the fossil map of the world". Retrieved 31 August 2016.
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