1. Non-food applications of milk components and dairy co-products: a review;Audic;De Lait,2003
2. Cleaner energy for sustainable future;Dovì;Journal of Cleaner Production,2009
3. Using process integration technology for cleaner production;Dunn;Journal of Cleaner Production,2001
4. E N ISO 14040: Environmental management – Life cycle assessment – Principles and framework, 1997, Genève, Switzerland.
5. ESU-ETHZ 1000. Ökoinventare von Energiesystemen, 3. Auflage, 1996. Bundesamt für Energiewirtschaft, Zürich, Switzerland.