1. How to select and how to rank projects: The Promethee method;Brans;European J. Oper. Res.,1986
2. PROMCALC and GAIA: A new decision support system for multicriteria decision aid;Brans;Decision Support Systems,1994
3. EPA, 1977. The gypsum and wallboard industry. In: Industrial Process Profiles for Environmental Use, Chap. 17, vol. 17. EPA
4. Heijungs et al., 1992. Life Cycle Assessment of Products – Background and Guide. CML, Leiden University
5. Le Téno, J.F., Chevalier, J.L., 1998a. Life cycle analysis with ill-defined data and its application to building products. To be published