1. Аkhmetgaleeva, N.B., 2015. Kamennyj vek Posemya: verkhnepaleoliticheskaya stoyanka Byki-7 [Stone Age of the Seim region: the Upper Palaeolithic Site of Byki-7]. Mechta, Kursk (in Russian).
2. Fossil remains of the mycorrhizal fungal Glomus fasciculatum complex in postglacial lake sediments from Maine;Anderson;Can. J. Bot.,1984
3. The history of the Sudzha town foundation;Babin,2015
4. Bagalei, D.I., 1887. Ocherki iz istorii kolonizatsii stepnoy okrainy Moskovskago gosudarstva. Universitetskaya tipografiya M. Katkova, Moscow (in Russian).
5. A palaecological study of a Late Holocene section from 'Het Ilperweld', W. Netherlands;Bakker;Rev. Palaeobot. Palynol.,1982