1. Wadel G. Sustainability in industrialized architecture: Modular lightweight construction applied to housing (La sostenibilidad en la construcción industrializada. La construcción modular ligera aplicada a la vivienda). Doctoral Thesis. Polytechnic University of Catalonia-Department of Architectural Constructions; 2009. Available online at: http://www.tdx.cat/TDX-0122110-180946.
2. Economic development and ecological degradation (Desarrollo económico y deterioro ecológico). Colección Economía y Naturaleza;Naredo,1998
3. Valero A. Exergy Evolution of the Mineral Capital on Earth (Estudio de la Evolución Exergética del Capital Mineral de la Tierra) Doctoral Thesis. University of Zaragoza-Department of Mechanical Engineering; 2008. Available on line at: https://www.educacion.es/teseo/mostrarRef.do?ref=730386.
4. Exergy-A useful indicator for the Sustainability of mineral resources and Mining. SDIMI Conference;Valero Delgado;Gold Coast QLD Australia,2009
5. Malmqvist T, Glaumann M, Scarpellini S, Zabalza I, Aranda A, Llera E, Díaz S. Life cycle assessment in buildings: The ENSLIC simplified method and guidelines. Energy, in press, doi:10.1016/j.energy.2010.03.026.