1. Hendriks, Ch. F., ‘Sustainable Construction’ (Ęneas Technical Publishers, Boxtel, October 2001) 158 pp.
2. Vogtländer, J.G., ‘The model of the Eco-costs/Value Ratio, a new LCA based decision support tool’, Thesis Delft University of Technology, DfS, Delft, September 2001, 286 pp.
3. Porter, M.E., ‘Competitive advantage’ (Free Press, New York, 1985).