Thermal extraction of oil from a Utah Green River (USA) oil shale in autoclavesJohannes, Ille; Tiikma, Laine; Luik, Hans; Šarajeva, GalinaInternational journal of engineering and applied sciences (EAAS)2015 / p. 23-35 : ill http://eaas-journal.org/survey/userfiles/files/v6i504%20Oil%20Shale%20and%20Renewables%20Research(1).pdf