Formation of air-polluting compounds while burning oil shaleOts, ArvoEnergy and Environment 1991 : International Symposium on Energy and Environment, August 25-28, 1991, Espoo, Finland1991 / p. 284-290: ill Problems of desulfurization of flue gas at Estonian and Baltic thermal power plantsKuusik, Rein, keemik; Kaljuvee, Tiit; Jegorov, D.; Maarend, JaakEnergy and environment 1991 : International Symposium on Energy and Environment, August 25-28, 1991, Espoo, Finland1991 / p. 489