1. Belnap, J., Kaltenecker, J.H., Rosentreter, R., Williams, J., Leonard, S., Eldridge, D., 2001. Biological soil crusts: ecology and management. Technical Reference 1730-2. USDIBLM, Colorado, pp. 11–40.
2. Potential contribution of carbon by microphytic crusts in Pinyon–Juniper woodlands;Beymer;Arid Soil Research Rehabilitation,1991
3. A preliminary note on a collection of algae from Jodhpur and environs;Bhandari,1952
4. Nitrogen total;Bremner,2000
5. Synopsis: comparative biogeography and ecology of soil crust biota and communities;Bûdel,2001