1. Boyce MP (2002) Gas turbine engineering handbook. Gulf Professional Publishing, Houston
2. Morris H (2017) How many planes are there in the world right now? The telegraph.
http://www.telegraph.co.uk/travel/travel-truths/how-many-planes-are-there-in-the-world/
. Accessed 17 Mar 2018
3. Elsayed EA (2012) Reliability engineering. Wiley, New York
4. Carter TJ (2005) Common failures in gas turbine blades. Eng Fail Anal 12(2):237–247
5. Hershey JE, Ackerman JF, Hanagandi VKM, Aragones AV, Osborn BE, Chbat NW, Korkosz RA (2002) Method and apparatus for determining an effective jet engine maintenance schedule. US Patent 6,473,677