G.  Yang, Yang, J., and Li, S., ?Dynamic parse approach of ladder diagram based on binary logic tree on the soft PLC system?, Journal of Digital Information Management, vol. 15, no. 5, pp. 241 - 250, 2017.

D.  Tang and Yang, J., ?A new shuffled frog leaping algorithm with space zoomed factor and gravity attractor?, Journal of Digital Information Management, vol. 11, no. 5, pp. 352 - 358, 2013.