1. Asahina, Y...Lichens in H. Kihara, Fauna and Flora of Nepal Himalaya, Kyoto University, Japan, 1955,1, 43–68.
2. Awasthi, D. D... “On new species from the Himalayas—I,”Proc. Ind. Acad. Sci., 1957,45, 129–39.
3. Nylander, W. ..Synopsis Methodica Lichenum (1858–60), Paris Martinet, 1860.