1. Sh. I. Gavasheli, “Soil Temperature,” in Tr. ZakNIGMI, Vol. 44(50), (Gidrometeoizdat, Leningrad, 1971), pp. 132–153 [in Russian].
2. R. V. Maglakelidze, “Soil Temperature Regimes of Natural Landscapes of the Martskop Experimental Station,” Kavkazsk. Geogr. Zh., No. 4, 113–115 (2004).
3. T. F. Urushadze (Ed.) Soil Map of Georgia, Scale 1: 500000 (Kartfabrika, Tbilisi, 2000).
4. Reference Book on Climate of the Soviet Union, Iss. 14, No. 2 (Gidrometeoizdat, Leningrad, 1967) [in Russian].
5. T. F. Urushadze, Mountainous Soils of the Soviet Union (Agropromizdat, Moscow, 1989) [in Russian].