1. Midling O. Friction stir welding aluminium – process and applications. 7th INALCO Conference; Cambridge; 1998
2. Christner B, et al. Friction stir welding system development for thin gauge aerospace structures. 4th International Symposium on friction stir welding; Utah, USA; 2003
3. Christner B, et al. Development and testing of friction stir welding as a joining method for primary aircraft structure. 4th International Symposium on friction stir welding; Utah, USA; 2003