1. Fixed-bed pyrolysis of Cynara cardunculus L. Product yields and compositions;Encinar;Fuel Processing Technology,2000
2. Char quality and tar formation interdependence: first experiments in a new two-stage gasifier;Fassinou,2005
3. Association Française de Normalisation, charbon de bois et briquettes de charbon à usage domestique: dénomination, spécifications, essais. AFNOR 84361 NF B 55-101, (20 September 1984).
4. Guideline for sampling and analysis of tar and particles in biomass producer gases — final report documenting the guideline, R&D work and dissemination;van Paasen,2002
5. The Guideline (version 3.3) can be downloaded at the web-site www.tarweb.net.