1. For example, Technical Committee on Structural Transition Joint: Studies on the Properties of Aluminium Alloy-Steel Transsition Pieces for Structural Transition Joint (STJ) of Ship Superstructure;Journal of Light Metal Welding & Construction,1978
2. Friction welding of light metals;Tokisue;Journal of Japan Institute of Light Metals,2002
3. Effect of friction welding conditions and aging treatment on mechanical properties of A7075-T6 aluminum alloy friction joint;Kimura;Science and Technology of Welding and Joining,2005
4. Japanese Industrial Standards. JIS Z 2343-1 Non-destructive tesitng - Penetrant tesitng - Part 1: General principles - Method for liquid penetrant testing and classification of the penetrant indication,2001
5. Japan Light Metal Association,2007