1. des Abbayes H (1968) Les lichens du genre Thysanothecium Mont. et Berk. (Cladoniacées) et leur constitution chimique. — The Journal of Japanese Botany 43: 302–304
2. Ahti T (1982a) Evolutionary trends in cladoniiform lichens. — The Journal of the Hattori Botanical Laboratory 52: 331–341
3. Ahti T (1982b) The morphological interpretation of cladoniiform thalli in lichens. — Lichenologist 14: 105–113
4. Ahti T (1993) Names in current use in the Cladoniaceae (lichenforming ascomycetes) in the ranks of genus to variety. — Regnum Vegetabile 128, pp 58–106. Koeltz Scientific Books, Königstein
5. Ahti T. (2000) Cladoniaceae. — Flora Neotropica Monograph 78: 1–362