1. Fifth International Conference on Woodfiber-Plastic Composites, Forest Products Society, Madison (Wisconsin), USA, 1999.
2. Natural Fibres Forum Proceedings, JEC Composites Forums, Paris, 2006.
3. Principia Partners. Wood Plastic Composites 2003 Study, Principia Partners, Exton, USA, 2003.
4. ;; Markets and Prices for Natural Fibers Study, Nova Institute, Germany, 2000.
5. Optimat Ltd., MERL Ltd. Wood plastic composites study-Technologies and UK market opportunities, The waste and resources action programme, Banbury (Oxon), UK, 2003.