Environmental risks and problems of the optimal management of an oil shale semi-coke and ash landfill in Kohtla-Järve, EstoniaVallner, Leo; Gavrilova, Olga; Vilu, RaivoScience of the total environment2015 / p. 400-415 : ill https://doi.org/10.1016/j.scitotenv.2015.03.130 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS