C. Yuying, “Research and Practice of the Teaching Method of Program-controlled Switching Principles,” Journal of Chengdu University Educational Sciences Edition, vol 24, No.5, 2010
 L. Tiansong, Zhou Haiyan, “Research on the Teaching of Program-Controlled Exchange Technology,” Journal of Electrical & Electronic Education, vol z1,No.31, 2009, pp. 54–56.
 B. Jiali, Modern Switching Principle and Communication Network Technology, Beijing: Beijing University of Posts and Telecommunications press, 2005
 G. Junping, G. Jinyong, F. Shurui, “Strengthen Teaching Innovation of the Curricular SPC Exchange Fundamentals to Accelerate Specialty Construction,” Journal of Adult Education School of Hebei University of Technology, vol. 22 No.1 Mar. 2007, pp.67–69