1. Properties and selection: nonferrous alloys and special-purpose materials;ASM,1995
2. Davies DP, AgustaWestland Internal Report, Reference LR07,131; 06/05/2008.
3. Aircraft Structural Integrity Course (course notes), DSGT, RAF College Cranwell, UK (ASIC No. 14). Helicopter Structural Integrity Present and Future, P 8-5.
4. Properties and selection: nonferrous alloys and pure metals;ASM,1979
5. Light alloys;Polmear,1989