References

1. Khullar, S. P. (2000). An illustrated Fern Flora of West Himalaya, Vol II. International Book distributors, Dehra Dun (India).
2. Khullar, S. P., Sharma, S. S. and Paramjit, S. (1982). Observation on the Ferns of Chakrata Hills, U.P (North West Himalayas) Proc. Indian Sci. Congr., 69(III): 67.
3. Khullar, S. P., Sharma, S. S. and Chaudhary, V. (1987). The Ferns of Garhwal- A checklist In: Western Himalaya Vol I (eds.) Y.P.S. Pangety, S.C.Joshi. Gyanodoya Prakashan Nainital. Pp. 347-388.
4. Khullar, S. P., Sharma, M.P and Chadha, J. (2005). A re-appraisal of the ferns of Mussoorie and Dehradun, Uttranchal.Indian Fern Jour., 22:14-42
5. Mehra, P. N. (1939). Ferns of Mussoorie. Punjab Univ. Publ., Lahore (India) Pp. 1-29.
6. Pande, H. C. and Pande, P. C. (2002-2003). An Illustrated fern flora of the Kumaon Himalaya Vol. II, Bishen Singh Mahendra Pal Singh, Dehra Dun (India).