Natural minerals opoka and glauconite as sorbents for acidic gasesKavaliauskaite, Inga; Denafas, Gintaras; Uibu, Mai; Kuusik, Rein, keemikEnvironmental research, engineering and management2006 / 3, p. 36-42 : ill https://www.researchgate.net/publication/228751613_Natural_Minerals_Opoka_and_Glauconite_as_Sorbents_for_Acidic_Gases