1. Boiler, A., and P.V. Code. 2004. Section VIII Division 1. NG-3000.
2. Lippold, J.C., S.D. Kiser, and J.N. DuPont. 2011. Welding Metallurgy and Weldability of Nickel-Base Alloys. John Wiley & Sons.
3. Chen, Z., et al. 2011. Mechanical design and analysis of an articulated-tracked robot for pipe inspection. In Robotic Welding, Intelligence and Automation, 461–467, Springer.
4. Chen, S.-B., and J. Wu. 2009. Intelligentized Methodology for Arc Welding Dynamical Processes, Springer.
5. Liu, Y.-K., and Y.-M. Zhang. 2015. Supervised learning of human welder behaviors for intelligent robotic welding. IEEE Transactions on Automation Science and Engineering.