• On efficiency of optimization in power systemsKeel, Matti; Medvedeva-TÅ¡ernobrivaja, Viktoria; Å uvalova, Jelena; Tammoja, Heiki; Valdma, MatiOil shale2011 / 1S, p. 253-261 : ill https://artiklid.elnet.ee/record=b2286681*est