1-Journal of Economics & Management Strategy, Product Unbundling in the Travel Industry: The Economics of Airline Bag Fees
JAN K. BRUECKNER, DARIN N. LEE, PIERRE M. PICARD, ETHAN SINGER, 2015.
2- Journal of Air Transport Management, An investigation into traveler preferences and acceptance levels of airline ancillary revenues
John F. O’Connell a, *, David Warnock-Smith, 2013.
3- Airline Economics Foundations for Strategy and Policy by Micheal W. Tretheway and Tae H. Oum, 1992.
4-How Airlines Compete, William M. Swan, July 2002.
5-Airlines Management: Strategies For THE 21ST CENTURY PAUL STEPHEN DEMPSEY, LAURANCE E.GESELL, 2006.