hauschild, maike, uwe wittmann, and reiner enders. “The German REFINA R+D Program for the Reduction of Greenfield Development and for Promoting Sustainable Land Management”. Italian journal of engineering geology and environment (October 30, 2007): 1–2. Accessed May 5, 2024. https://rosa.uniroma1.it/rosa02/engineering_geology_environment/article/view/1062.