Y. Cai, H. L. Yang, K. Xu and Y. X. Wu, “An On-line Evaluation Model for Process Stability of Short-Circuit Arc Welding,” Journal of Shanghai Jiaotong University, Vol. 39, No. 7, July 2005, pp. 1038-1041.
 R. T. Charles, A. L. Randall and B. S. Herschel, “Is There Evidence of Determinism in Droplet Detachment within the Gas Metal Arc Welding Process,” 6th International Conference on Trends in Welding Research, April 2002.
 B. Cao, X. Q. Lv, M. Zeng and S. S. Huang, “Analysis of Welding Conditions in Short-Circuiting Transition Base on Approximate Entropy,” Chinese Journal of Mechanical Engineering, Vol. 43, No. 10, October 2007, pp. 50-54. doi:10.3901/JME.2007.10.050