1. Watanabe Y., Chavent P., Seguin C., de Plinval H., Loquen T., Sanfourche M., Piet Lahanier H., Planckaert L., Binet L., Rakotomamonjy T., and Le Saux B.. 2013. PR AZUR Annual Report. ONERA. Technical Report RT 3/18891 DCSD.
2. Demaret B., and Pahlke K.. 2014. Rotorcraft Research Annual Report. ONERA– DLR Technical Report.
3. Mettler B., Kong Z., Goerzen C., and Whalley M.. 2010. Benchmarking of obstacle field navigation algorithms for autonomous helicopters. 66th Annual Forum of the American Helicopter Society. Phoenix, AZ.
4. Padfield G., Clark G., and Taghizad A.. 2005. How long do pilots look forward? Prospective visual guidance in terrain-hugging flight. 31st European Rotorcraft Forum. Florence, Italy.