1. Recent advances in biomass conversion technologies;Demirbas;Energy Edu Sci Technol,2000
2. Solar thermal collectors and applications;Kalogirou;Prog Energy Combust Sci,2004
3. Sayigh AAW. Renewable energy: global progress and examples. Renew Energy 2001, WREN; 2001 p. 15–7.
4. Renewable fuels and electricity for a growing world economy;Johanson,1993
5. World energy assessment 2000—energy and the challenge of sustainability;UNDP,2000