Flakus, A., Ahti, T., Kukwa, M. & Wilk, K. 2008: New and interesting records of Cladonia and their lichenicolous fungi from the Andean cloud forest in Bolivia. — Ann. Bot. Fennici 45: 448–454. http://www.sekj.org/PDF/anb45-free/anb45... [jako Cladonia kriegeri]