Co-operation of Estonia's oil shale based power system with wind turbinesLiik, Olev; Oidram, Rein; Keel, Matti; Ojangu, Jaanus; Landsberg, Mart; Dorovatovski, NikolaiOil shale2005 / 2S, p. 127-142 : ill https://artiklid.elnet.ee/record=b2346707*est