Schmitz, N., Hesse, M., & Becker, T. (2022). Informality in the regional growth process. Insights into a “black box” of planning practice in the case of Luxembourg. Raumforschung Und Raumordnung | Spatial Research and Planning, 80(6), 711-726. https://doi.org/10.14512/rur.175 (Original work published 2022)