1. Akaev, B.A., Ataev, Z.V., Gadzhiev, B.S., Gadzhieva, Z.Kh., Ganiev, M.I., Gasanguseinov, M.G., Zalibekov, Z.M., Ismailov, Sh.I., Kasparov, S.A., Lepekhina, A.A., Musaev, V.O., Rabadanov, R.M., Sobolev, D.V., Surmachevskii, V.I., Tagirov, B.D., et al., Fizicheskaya geografiya Dagestana (Physical Geography of Dagestan), Akaev, B.A., Ed., Makhachkala, 1996.
2. Anderson, J.P.E. and Domsch, K.H.A., Physiological method for the quantitative measurement of microbial biomass in soils, Soil Biol. Biochem., 1978, vol. 10, no. 3, pp. 215–221.
3. Arinushkina, E.V., Rukovodstvo po khimicheskomu analizu pochv (Manual for Chemical Analysis of Soils), Moscow: Mosk. Gos. Univ., 1970.
4. Azaiez, N., Alleoua, A., Baazaoui, N., and Qhtani, N., Assessment of soil loss in the Mirabah basin: an overview of the potential of agricultural terraces as ancestral practices (Saudi Arabia), Open J. Soil Sci., 2020, vol. 10, no. 5, pp. 159–180.
5. Babaeva, M.A., Distribution pattern of humus in soils of Dagestan, Arid.
Ekosist., 2002, vol. 8, no. 17, pp. 68–72.