TY - JOUR A1 - Otto, Andreas H. A1 - Schrader, Sigurd A1 - Steiger, Th. A1 - Schneider, M. T1 - Gas phase deprotonation energies of Sulfuric Acid, Perchloric Acid, Chlorsulfuric Acid and Fluorosulfuric Acid Y1 - 1997 ER -