1. Agroklimaticheskii spravochnik po DASSR (Agroclimatic Handbook for the Dagestan ASSR), Leningrad: Gidrometeoizdat SSSR, 1973.
2. Akaev, B.A., Hydrogeological structure of Dagestan, in Fizicheskaya geografiya Dagestana (Physical Geography of Dagestan), Moscow: Shkola, 1996, pp. 32–68.
3. Akimtsev, V.V., Pochvy Prikaspiiskoi nizmennosti Kavkaza (Soils of the Caspian Lowland in the Caucasus), Rostov-on-Don: Rostov. Gos. Univ., 1957.
4. Arinushkina, E.V., Rukovodstvo po khimicheskomu analizu pochv (Manual for Chemical Analysis of Soils), Moscow: Mosk. Gos. Univ., 1978.
5. Babaev, A.G., Historical and geographical analysis of the desert ecosystems dynamics, Probl. Osvoeniya Pustyn, 1989, no. 5, pp. 18–25.