1. Chandra, S. (2000). The Ferns of India (Enumeration Synonyms & Distribution). International Book Distributors, Dehra Dun
2. Fraser-Jenkins, C.R. (2008). Taxonomic Revision of Three Hundred Indian Sub Continental Pteridophytes with Revised Census List- A New Picture of Fern Taxonomy and Nomenclature in the Indian Subcontinent. Bishen Singh Mahendra Pal Singh, Dehra Dun
3. IUCN (2012). Guidelines for Application of IUCN Red List Criteria at Regional and National Levels Version 4.0, IUCN, Gland, Switzerland
4. Khullar, S.P. and Verma, S.K. (2010). The Pteridophytes of Mandi District (Himachal Pradesh). In Tewari, L. M., Pangtey, Y. P. S. & Tewari, G. (Eds.), Biodiverstiy Potentials of Himalaya. Gyanodaya Prakashan, Nainital
5. Khullar, S.P. (1994). An Illustrated Fern Flora of Western Himalaya Vol. - I, International Book Distributors, Dehra Dun
6. Khullar, S.P., Baghla, A. and Verma, S. (2008). The Pteridophytic Wealth of The District Solan (Himachal Pradesh, India). In: Verma, S.C., Khullar, S.P. & Cheema, H. K. (Eds.), Perspectives In Pteridophytes. Bishen Singh Mahendra Pal Singh, Dehra Dun
7. Khullar, S.P., Chadha, J., Baghla, A., and Verma, S. (2009). Annoted Inventory of the Pteridophytes of Sirmaur District, Himachal Pradesh. Indian Fern J. 26:79-106
8. Negi, H.C. (2009). Some Common Pteridophytes and Gymnosperms of District Kinnaur (Himachal Pradesh) - Ph. D. (Botany) Thesis Submitted In Deptt. of Bio-Sciences, Himachal Pradesh University, Shimla
9. Pichi Sermolli, R.E.G. (1977). Tentamen Pteridophytorum Genera In Taxonomicum Ordinem Redigendi. Webbia, 31(2): 313-512. https://doi.org/10.1080/00837792.1977.10670077
10. Seth, M.K. and Kumar, S. (2005a). Tracheary Elements in Pteridophytes of Bilaspur (Himachal Pradesh). Part – I Length, Breadth and Length/ Breadth Ratio of Tracheids. Indian Fern J. 22: 128-136
11. Seth, M.K. and Kumar, S. (2005b). Tracheary Elements In Pteridophytes of Bilaspur (Himachal Pradesh), Part- II Length, Breadth And Length/ Breadth Ratio Of Vessels. Indian Fern J. 22: 137-145
12. Seth, M.K. and Kumar, S. (2007). Pteridophytic Flora of Bilaspur, Himachal Pradesh. Part 1: A General Account of Bilaspur District and 13 Most Common Pteridophytes. In: Prashar, I. B. & Ahluwalia, A. S. (Eds.), 19-45. Achievements and Prospects in Pteridophytes. Bishen Singh Mahendra Pal Singh, Dehra Dun
13. Seth, M.K., Kumari, A. and Khullar, S.P. (2002a). Common Pteridophytes of Shimla (Himachal Pradesh): Family Athyriaceae. Bull. Bot. Sur. India, 42(1-4): 41-64
14. Seth, M.K., Kumari, A., Bhandari, A. and Khullar, S.P. (2002b). Common Pteridophytes of Shimla (Himachal Pradesh), N. W. Himalayas III: Polypodiaceae, Loxogrammaceae, Cryptogrammaceae, Sinopteridaceae and Osmundaceae. Indian Fern J. 19: 10-33
15. Seth, M.K., Bhandari, A. and Khullar, S.P. (2002c). Common Pteridophytes of Shimla (Himachal Pradesh), N.W. Himalayas IV: Families Dryopteridaceae, Hypodematiaceae, Thelypteridaceae, Blechnaceae, and Pteridaceae. Indian Fern J. 19: 55-81
16. Seth, M.K., Kumari, A., Bhandari, A. and Khullar, S.P. (2004). Common Pteridophytes of Shimla (Himachal Pradesh), N. W. Himalayas I: Adiantaceae, Hemionitidaceae, Davalliaceae & Aspleniaceae. J. Econ. & Tax. Bot. 28: 635-652
17. Seth, M.K., Seth, A. and Negi, H.C. (2004a). Pteridophytic Flora of Kinnaur, Himachal Pradesh. Part I: A General Account of Kinnaur District and Eight Species Belonging to Order Pteridales. Indian Fern J. 21: 45-62
18. Seth, M.K., Seth, A. and Negi, H.C. (2004b). Pteridophytic Flora of Kinnaur, Himachal Pradesh. Part II: 13 Common Pteridophytes Belonging to Families Hypodematiaceae, Athyriaceae, Dryopteridaceae, Selaginellaceae and Equisetaceae. Indian Fem J. 21: 63-80.
19. Seth, M.K., Seth, A. and Negi, H.C. (2004c). Pteridophytic Flora of Kinnaur, Himachal Pradesh. Part III: Nine Common Pteridophytes Belonging to Families Dennstaedtiaceae, Thelypteridaceae and Aspleniaceae. Phytotaxonomy, 4: 25-35