1. Bauerek, A., Cabala, J., & Smieja-Krol, B. (2009). Mineralogical alterations of Zn–Pb flotation wastes of the Mississippi Valley Type ores (Southern Poland) and their impact on contamination of rain water runoff. Polish Journal of Environmental Study, 18(5), 781–788.
2. Belnap, J. (1993). Recovery rates of cryptobiotic crusts: Inoculants use assessment methods. Great Basin Naturalist, 53, 89–95.
3. Belnap, J. (2003). Factor influencing nitrogen fixation and nitrogen release in biological soil crusts. In Belnap, J., Lange, O.L. (eds): Biological soil crusts: structure, function, and management. Ecological Studies. 150, pp. 241-261
4. Belnap, J. K., Harper, T., & Warren, S. D. (1994). Surface disturbance of cryptobiotic soil crusts: Nitrogenase activity, chlorophyll content, and chlorophyll degradation. Arid Soil Research and Rehabilitation, 8, 1–8.
5. Büdel, B. (2003). Biological soil crusts in European Temperate and Mediterranean regions. In Belnap, J., Lange, O.L. (eds), Biological soil crusts: structure, function, and management. Ecological Studies. 150, pp. 75-86