• Estonian calcareous rocks as SO2 sorbents in AFBC and PFBC conditions [Electronic resource]Trikkel, Andres; Kuusik, Rein, keemik; Zevenhoven, RonProceedings of the 15th International Conference on Fluidized Bed Combustion : May 16-19, 1999, Savannah, Georgia1999 / [18] p. : ill. [CD-ROM]