1. Chernova, O.V., Alyabina, I.O., Bezuglova, O.S., and Litvinov, Yu.A., The current state of the humus content in arable chernozems of the real steppes (by example of Rostov oblast), Yug Ross.: Ekol., Razvit., 2020, vol. 15, no. 4 (57), pp. 99–113.
2. Kovda, V.A., Problemy opustynivaniya i zasoleniya pochv aridnykh regionov mira (Desertification and Salinization of Soils in Arid Regions of the World), Moscow: Nauka, 2008.
3. Materialy krupnomasshtabnogo pochvennogo obsledovaniya Saratovskogo, Arkadakskogo, Ershovskogo i Novouzenskogo raionov Saratovskoi oblasti (Materials of a Large-Scale Soil Survey of the Saratov, Arkadak, Ershov, and Novouzenskii Districts of Saratov Oblast), Saratov: Yuzhgiprozem, 1955–1994.
4. Marthews, T.R., Dadson, S.J., Jones, R.G., Otto, F.E.L., Allen, M.R., Mitchell, D., and Guillod, B.P., The impact of human-induced climate change on regional drought in the horn of Africa, J. Geophys. Res.: Atmos., 2019, vol. 124, no. 8, pp. 4549–4566.
5. Medvedev, I.F., Levitskaya, N.G., and Makarov, V.Z., Monitoring of erosion processes on chernozems of the Volga region, Izv. Sarat. Gos. Univ.,
Ser.: Nauki o Zemle, 2016, vol. 16, no. 3, pp. 142–146.