SCHMIDT, Albert. The role of regional planning in designating flora and fauna habitats and bird sanctuaries of European significance. Raumforschung und Raumordnung | Spatial Research and Planning, DE, v. 58, n. 5, p. 382–388, 2000. DOI: 10.1007/BF03182928. Disponível em: https://rur.oekom.de/index.php/rur/article/view/1169.. Acesso em: 8 may. 2024.