• Quantification of oil shale industry ash flows – their chemical and mineralogical compositionUmmik, Mari-Liis; Tamm, Kadriann; Järvik, Oliver; Nešumajev, Dmitri; Roosalu, Kati; Pihu, Tõnu; Konist, AlarOil shale2025 / p. 129-166 https://doi.org/10.3176/oil.2025.2.01