1. Milà i Canals L, Rieradevall J, Domènech X, Fullana P, Puig R. (1998): Anàlisi del Cicle de Vida de la Pell. Aplicació a la definició de criteris per a la concessió de l’ecoetiqueta. Department for the Environment of the Government of Catalonia (in Catalan)
2. Rieradevall J, Domènech X, Fullana P (1997): Application of Life Cycle Assessment to Landfilling. Int J LCA 2 (3) 141–144
3. ISO (1997): ISO 14 040:1997 (E): Environmental management — Life cycle assessment — Principles and framework. Switzerland, 1997
4. Baumann H. (1998): Life Cycle Assessment and Decision Making — theories and practices. PhD thesis. AFR Report 183, Technical Environmental Planning, Chalmers University of Technology. Göteborg, Sweden
5. Tillman AM (1998): Significance of decision making for LCA methodology. Key-note lecture for SETAC-Europe annual meeting, Bordeaux 14—18 April 1998