A new model for electron flow during anaerobic digestion: direct interspecies electron transfer to Methanosaeta for the reduction of carbon dioxide to methane - Rotaru, Amelia-Elena; Shrestha, Pravin Malla; Liu, Fanghua; Shrestha, Minita; Shrestha, Devesh; Embree, Mallory; Zengler, Karsten; Wardman, Colin; Nevin, Kelly P.; Lovley, Derek R. (Energy & environmental science, 2014)