Enhancement of methane productivity of anaerobic reactors of wastewater treatment plantsKuusik, Aare; Loigu, Enn; Sokk, Olev; Kuusik, ArgoWorld Acedemy of Science, Engineering and Technology : International Science Index2012 / p. 1296-1298

Possibility of enhancing methane productivity in anaerobic reactors in the treatment of excess sludge from wastewater treatment plantsKuusik, Argo; Loigu, Enn; Kuusik, Aare; Sokk, OlevInternational journal of science and engineering investigations2013 / p. 33-36

Selection of most promising substrates for biogas productionKuusik, Argo; Kuusik, Aare; Loigu, Enn; Sokk, Olev; Pachel, KarinInternational journal of energy and environment2013 / p. 115-124 : ill