1. Lakshmi Balasubramaniam G, Boldsaikhan E, Fukada S, Fujimoto M, Kamimuki K (2020) Effects of refill friction stir spot weld spacing and edge margin on mechanical properties of multi-spot-welded panels. J Manuf Mat Process 4:55
2. Lakshmi Balasubramaniam G, Boldsaikhan E, Joseph Rosario GF, Ravichandran SP, Fukada S, Fujimoto M, Kamimuki K (2021) Mechanical properties and failure mechanisms of refill friction stir spot welds. J Manuf Mat Process 5:118
3. Schilling C, dos Santos J (2004) Method and device for joining at least two adjoining work pieces by friction welding
4. Itapu S, Muci-Küchler K (2006) Visualization of material flow in the refill friction stir spot welding process, 0148-7191. SAE Technical Paper
5. Watanabe M, Feng K, Nakamura Y, Kumai S (2011) Growth manner of intermetallic compound layer produced at welding interface of friction stir spot welded aluminum/steel lap joint. Mater Trans 52:953–959