Journal of Air Transport Management
Journal of Air Transport Management > 2008 > 14 > 4 > 179-187
Journal of Air Transport Management > 2008 > 14 > 5 > 280-285
Journal of Air Transport Management > 2008 > 14 > 4 > 179-187
Journal of Air Transport Management > 2008 > 14 > 5 > 280-285