TY - JOUR U1 - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed) A1 - Knorr, Andreas A1 - Heinemann, André T1 - Regional Airports as Two-Sided Markets. The Case for a More Economic Approach in the Application of the EU's State Aid Rules JF - Aerlines Magazine N2 - . Y1 - 2009 IS - 46 ER -