1. J. Stavridis, A. Papacharalampopoulos and P. Stavropoulos, Quality assessment in laser
2. J. Volpp, Keyhole stability during laser welding-Part
3. K. Stefan, Process monitoring and control of laser beam
4. M. A. Maher, P. J. L. Webster, J. C. Chiao, et al., Coaxial real-time metrology and gas assisted laser