"A history of the world's airlines", R.E.G. Davies, Oxford U.P, 1964 "The airline encyclopedia, 1909–2000.” Myron J. Smith, Scarecrow Press, 2002 "Flying Off Course: The Economics of International Airlines," 3rd edition. Rigas Doganis, Routledge, New York, 2002. "The Airline Business in the 21st Century." Rigas Doganis, Routledge, New York, 2001. External links Economics of transport and utility industries