@techreport{HessamiHilligweg2003, author = {Mir-Akbar Hessami and Arnd Hilligweg}, title = {Biomass}, series = {Sonderdruck / Schriftenreihe der Georg-Simon-Ohm-Hochschule, N{\"u}rnberg}, number = {21}, pages = {10 S.}, year = {2003}, }