1. J. Ehrenberg, Current situation and future prospects of EU industry using renewable raw materials, coordinated by the European Renewable Resources & Materials Association, European Commission DG Enterprise Unit E.1: Environmental Aspects of Industry Policy, Brussels, February 2002.
2. CESIO (Comité européen des agents de surface et leurs intermédiaires organiques), Presentation to the Renewable Raw Materials Group (Working Group 5/Industry) under the European Climate Change Programme (ECCP), Brussels, 13 February 2001