CHRISTY, A.; ANILKUMAR, A.; MK, L.; AK, A. K.; STEEPHAN, M.; SEQUEIRA, S. Current Status of Lichen Genus Usnea sensu lato in Kerala, Part of Western Ghats with Four New Records to the State. Cryptogam Biodiversity and Assessment, v. 9, n. 01, p. 1-5, 17 Nov. 2002.