Search for: [References = "80. Koter M., 1998. Frontier peoples – origin andclassification \[in\:\] M. Koter, K. Heffner \(eds.\),Borderlands or transborder regions – geographical,social and political problems, Region andRegionalism, 3, Opole\-Łódź\: University of Łódź.Department of Political Geography and RegionalStudies, Silesian Institute in Opole, pp. 28\-38."]