1. ANSI Z136.1-2007 American National Standard for Safe Use of Lasers.
2. AWS D17.1:2001 Specification for Fusion Welding for Aerospace Applications.
3. Safety of laser products – Part 1: Equipment classification and requirements;BS EN 60825-1,2007
4. Phase transformation during cooling in α+β titanium alloys;Ahmed;Mater. Sci. Eng.,1998
5. Laser and hybrid laser-MIG welding of 6.35mm and 12.7mm thick aluminium aerospace alloy;Allen,2006