WAGNER, Gerhard. The EU enlargement process in the energy sector: A spatial-planning and urban-development perspective. Raumforschung und Raumordnung | Spatial Research and Planning, DE, v. 60, n. 5-6, p. 356–365, 2002. DOI: 10.1007/BF03184193. Disponível em: https://rur.oekom.de/index.php/rur/article/view/1624. Acesso em: 22 sep. 2026.