• Potential of biomass fuels to substitute for oil shale in energy balance in Estonian energy sectorPaist, Aadu; Kask, Ülo; Kask, Livia; Vrager, Allan; Muiste, Peeter; Padari, Allar; Pärn, L.Oil shale2005 / 4S, p. 369-379 : ill https://artiklid.elnet.ee/record=b2352606*est