Issue No.08 - August (1978 vol.27)
T. Nanya , Central Research Laboratories, Nippon Electric Co., Ltd.
One of two constructive procedures for universal single transition time (STT) state assignments presented in the paper  by Friedman et al. is not correct. A correct constructive procedure can be obtained by simply modifying the procedure of the literature with an additional restriction.
state assignments, Asynchronous sequential circuits, single transition time (STT) state assignments, universal
T. Nanya, "On Universal Single Transition Time Asynchronous State Assignments", IEEE Transactions on Computers, vol.27, no. 8, pp. 781-782, August 1978, doi:10.1109/TC.1978.1675192