1. Airlines struggle with fuel price turbulence;Adams;Corporate Finance,1997
2. Alexander, K.L., 2004. Airlines Find Fuel Prices Tough to Swallow. The Washington Post, June 3, E03.
3. Nonlinear Programming;Bertsekas,1999
4. A network approach to airline fuel allocation problems;Diaz;Annuals of the Society of Logistics Engineering,1990