Issue No.06 - June (1972 vol.21)
Leo Sintonen , Department of Electronics, Tampere University of Technology, Tampere, Finland.
A system of N-valued logic that is based on three basic sets of functions is described. These functions are selected so that they are easy to realize physically with conventional electronic circuitry. Furthermore, the system is functionally complete.
Leo Sintonen, "On the Realization of Functions in N-Valued Logic", IEEE Transactions on Computers, vol.21, no. 6, pp. 610-612, June 1972, doi:10.1109/TC.1972.5009020