1. Why aircraft fail;Findlay;Mater. Today,2002
2. Gorelik , M. 2016 Additive manufacturing and risk mitigation - a regulatory perspective
3. US Department of Defense-DoD 1998 Joint service specification guide-JSSG-2006-aircraft structures
4. Federal Aviation Administration-FAA 2012 14 CFR part 25: US airworthiness standards for transport category airplanes