- Evaluation of oil potential of Estonian shales and biomass samples using rock-eval analyzerJohannes, Ille; Kruusement, Kristjan; Palu, Vilja; Veski, Rein; Bojesen-Koefoed, JorgenOil shale2006 / 2, p. 110-118 : ill https://artiklid.elnet.ee/record=b2363543*est