A study on the EU oil shale industry - viewed in the light of the Estonian experience : a report by EASAC to the Committee on Industry, Research and Energy of the European ParliamentFrancu, J.; Harvie, B.; Laenen, B.; Siirde, Andres; Veiderma, Mihkel; Collins, P.; Steiger, F.2007 https://easac.eu/fileadmin/PDF_s/reports_statements/Study.pdf