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City-pairs vs #Airport-pairs: A market-definition methodology for the #airline industry http://t.co/oqSvTEJIRb doi:10.1007/s11151-012-9371-7
City-pairs vs #Airport-pairs: A market-definition methodology for the #airline industry http://t.co/oqSvTEJIRb doi:10.1007/s11151-012-9371-7