1. Helicopters – An Evolving Market; Dec 2017. mba.aero
2. PWC Aviation Finance – Fasten your seat belts; Jan 2013 pwc.com
3. Aviation Finance: A long term investment; April 2017. ey.com
4. Asia Pacific Region Civil Helicopters Fleet Report: Asian Sky Group 2017. asianskygroup.com
5. Helicopter OEMs: airbus.com, bellflight.com, leonardocompany.com
6. Key Helicopter Lessors: milestoneaviation.com, waypointleasing.com, lciaviation.com
7. Honeywell 2017 Turbine Powered, Civilian Helicopter Purchase Outlook