• Fast pyrolysis as a new approach to the upgrading of oil shale retorting methodsPikkor, Heliis; Maaten, Birgit; Siirde, AndresInternational IX Oil Shale Conference 2017 "Oil Shale Industry in Circular Economy" : 15th-16th November 2017, [Jõhvi], Ida-Viru County, Estonia : summary2017 / p. 23 http://www.ester.ee/record=b4751282*est