Heiland, P. and Dapp, K. (2001) “The contribution of spatial planning to advances in flood prevention: National and transnational, planning-based approaches illustrated with reference to the catchment areas of the rivers Rhine and Order”, Raumforschung und Raumordnung | Spatial Research and Planning, 59(5-6), pp. 337–350. doi:10.1007/BF03183035.