1. Air Transport Action Group (ATAG).
http://www.atag.org/facts-and-figures.html
2. International Air Transport Association, IATA price analysis.
http://www.iata.org/publications/economics/fuel-monitor/Pages/price-analysis.aspx
3. Abramson, M., Audet, C., Couture, G., Dennis, J., Le Digabel, S., Tribes, C.: The NOMAD project.
https://www.gerad.ca/nomad/
4. Springer Series in Operations Research and Financial Engineering;Charles Audet,2017
5. Bremner, D., Chan, T.M., Demaine, E.D., Erickson, J., Hurtado, F., Iacono, J., Langerman, S., Patrascu, M., Taslakian, P.: Necklaces, convolutions, and X+Y. CoRR abs/1212.4771 (2012).
http://arxiv.org/abs/1212.4771