Anaerobic treatment of sewage sludge and grease trap sludge in continuous co-digestion by Neczaj E., Bien J., Grosser A., Worwag G. and Kacprzak M.
International overview on waste to biofuel options with a focsu on waste potentials in Germany and funding incentives in the EC by Kretzschmar J., Majer S. and Kroeger M.
Emission estimates and air quality impacts from the use of alternative fuels by the Titan cement factory in Thessaloniki by Moussiopoulos N., Banias G., Douros J. , Michailidou A.V. and Tsegas G.