KÜLZER, Stephanie. Formal and informal Instruments: How can they best complement each other? Exemplarily illustrated through the planning determination process and regional dialogue forum for the extension of Frankfurt Airport. Raumforschung und Raumordnung | Spatial Research and Planning, DE, v. 67, n. 4, p. 318–329, 2009. DOI: 10.1007/BF03183194. Disponível em: https://rur.oekom.de/index.php/rur/article/view/985.. Acesso em: 18 mar. 2025.