• Influence of thermal pre-treatment on mesophilic anaerobic digestion of sludgesMenert, Anne; Vaalu, Tarmo; Michelis, Merje; Blonskaja, Viktoria; Rikmann, Ergo; Mets, Aita; Vilu, RaivoThe 7th International Conference : Environmental Engineering : May 22-23, 2008, Vilnius, Lithuania : selected papers. Volume II, Water engineering. Energy for buildings2008 / p. 625-635 : ill