1. ACAP. 2010. Annual Report upper Mustang Unit Conservation Office. Annapurna Conservation Area, Unit Conservation Office, Lomanthang, Mustang, Nepal 1–89.
2. Pikas ( Ochotona princeps ?: Lagomorpha) as allogenic engineers in an alpine ecosystem
3. Alban L. A. Kellog M. . 1959. Methods of soil analysis as used in the OSC soil testing laboratory. Oregon Agriculture Experiment Station Miscellaneous Paper 65:1–8. http://ir.library.oregonstate.edu/xmlui/bitstream/handle/1957/4116/SR%20no.%2065_ocr.pdf?sequence=1. Accessed 12 March 2014.
4. Anderson M. U. Gorley R. N. Clarke K. R. . 2008. PERMANOVA+ FOR PRIMER: guide to software and statistical methods. PERIMER-E, Plymouth, United Kingdom.
5. AOAC. 1990. Official methods of analysis. Association of Official Analytical Chemists, Arlington, Virginia.