Issue No.07 - July (1969 vol.18)
T.T. Nieh , Hughes Aircraft Company
The Rabin and Scott  model of finite automata (both deterministic and nondeterministic) is generalized by allowing the state transitions and final state set to be functions of time. The basic line of inquiry in this paper follows the spirit of the work of Rabin and Scott. Although a few theorems in this present paper are due to Agasandjan ,  who presumably initiated the study of time-variant automata, most results are the author's original contribution.
T.T. Nieh, "R69-17 On Finite Automata with a Time-Variant Structure", IEEE Transactions on Computers, vol.18, no. 7, pp. 668, July 1969, doi:10.1109/T-C.1969.222740