Published Review of Wastewater Reuse in the Mediterranean Countries, Focusing on Regulations and Policies for Municipal and Industrial Applications by Kellis M., Kalavrouziotis I.K. and Gikas P. 333-350_15-3_936_Kalavrouziotis.pdf
Published 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. 183-191_850_NRG_01_Kretzschmar_14-2.pdf