• The composition and properties of ash in the context of the modernisation of oil shale industryUibu, Mai; Tamm, Kadriann; Viires, Regiina; Reinik, Janek; Somelar, Peeter; Raado, Lembi-Merike; Hain, Tiina; Kuusik, Rein, keemik; Trikkel, AndresOil shale2021 / p. 155–176 : ill https://doi.org/10.3176/oil.2021.2.04 https://www.scopus.com/sourceid/17080 https://www.scopus.com/record/display.uri?eid=2-s2.0-85107566881&origin=inward&txGid=da436881b5b5fdf90bb95fbfc9a757fb https://jcr.clarivate.com/jcr-jp/journal-profile?journal=OIL%20SHALE&year=2022 https://www.webofscience.com/wos/woscc/full-record/WOS:000654376900004