Mishra, G. K., V. Shukla, S. Nayaka, and D. K. Upreti. “Lichen Communities As a Tool to Map Environmental Condition in Champawatdistrict of Uttarakhand”. Cryptogam Biodiversity and Assessment, Vol. 3, no. 01, June 2018, pp. 07-19, doi:10.21756/cba.v3i01.13385.