1. Alexander RW, Harvey AM, Calvo A, James PA, Cerda A (1994) Natural stabilisation mechanisms on badland slopes: Tabernas, Almeria, Spain. In: Millington AC, Pye K (eds) Environmental changes in drylands: biogeographical and geomorphological perspectives. Wiley, New York, pp 85–111
2. Andreeva VM (1998) Pochvennye i aerophilnye zelenye vodorosli (Chlorophyta: Tetrasporales, Chlorococcales, Chlorosarcinales [Terrestrial and aerophilic green algae; in Russian]. Nauka, Saint Petersburg, pp 1–351
3. Belnap J, Büdel B, Lange OL (2001) Biological soil crusts: characteristics and distribution. In: Belnap J, Lange OL (eds) Biological soil crusts: structure, function, and management. Springer, Berlin, pp 3–30
4. Belnap J, Gardner JS (1993) Soil microstructure in soils of the Colorado Plateau: the role of the cyanobacterium Microcoleus vaginatus. Great Basin Nat 53:40–47
5. Belnap J, Lange OL (2001) Biological soil crusts: structure, function, and management. Springer, Berlin, pp 1–503