Multiple-valued logic as a new computing paradigm - A brief survey of Higuchi's research on multiple-valued logic

Kameyama, M., Hanyu, T., & Aoki, T. (2005). Multiple-valued logic as a new computing paradigm - A brief survey of Higuchi’s research on multiple-valued logic. Journal of Multiple-Valued Logic and Soft Computing, 11(5–6), 407–436.