Firing Estonian oil shale in CFB boilersArro, Hendrik; Loosaar, Jüri; Ots, Arvo; Pihu, Tõnu; Prikk, Arvi; Rušeljuk, Pavel; Hiltunen, Matti; Hotta, A.; Parkkonen, R.; Peltola, K.Proceedings [of] 19th FBC Conference from May 21 - May 24 2006 in Vienna, Austria. Part II2006 / [10] p. : ill