1. Batlló I Colominas, M., 1993: Atmospherical problematic of cattle raising wastes. In: Cattle Raising Wastes, (coord.: Costa, P.), Barcelona, 1993, ed Fundació la Caixa (in Spanish)
2. Berg, N.W. van den et al., 1994: Beginning LCA. A guide into environmental Life Cycle Assessment. Leiden (Holland); February 1995
3. Coll Batllori, D., 1993: Livestock intensification as a wastes production process. In: Cattle Raising Wastes, (coord.: Costa, P.), Barcelona, 1993, ed Fundació la Caixa (in Spanish)
4. CTSS, 1985: Technical Symposium, December 1984: Health Risks in the use of Adhesives in the Footwear Industry. Generalitat Valenciana, Valencia, 1985 (in Spanish)
5. CTSS, 1990: Technical Symposium, December 1989: Control of Risk of Exposure to adhesives and solvents in the Footwear Industry. Generalitat Valenciana, Valencia, 1990 (in Spanish)