Search for: [References = "58. Ratti R. 1993. Spatial and economic effect of frontiers. Overview of traditional and new approaches and theories of border area development. \[in\:\] R. Ratti, S. Reichman \(eds.\), Theory and practice of transborder cooperation. Basel‑Frankfurtam Main\: Verlag Helbing \& Lichtenhahn, pp. 23‑53."]

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