1. Aubreville, A., Climats: Forêts et Désertification de l’Afrique Tropicale, Paris: Soc. Ed. Géogr., Maritimes Coloniales, 1949.
2. Durdusov, S.D., Khegai, V.E., and Zulaev, M.S., The revival of traditional animal husbandry in Kalmykia, Zootekhniya, 2003, no. 6, pp. 20–21.
3. Dyksterhuis, E.J., Ecological principles in range evaluation, Bot. Rev., 1958, vol. 24, pp. 253–272.
4. Dzybekov, D.S., Secondary recovery succession in semidesert and steppe vegetation, in Teoriya i praktika lesomelioratsii i lesoagrarnogo osvoeniya aridnykh territorii (Theory and Practice of Forest Melioration and Forest Agrarian Exploration of Arid Territories), Volgograd: Vseross. Nauchno-Issled. Inst. Agrolesomelior., 2001, no. 1 (109), pp. 125–128.
5. Gordeev, A.V. and Romanenko, G.S., Problemy degradatsii i vosstanovleniya produktivnosti zemel’ sel’skokhozyaistvennogo naznacheniya v Rossii (Degradation and Recovery of Productivity of Agricultural Lands in Russia), Moscow: Rosinformagrotekh, 2008.