Issue No. 04 - April (1978 vol. 11)
J.A. Darringer , IBM Thomas J. Watson Research Center
The advanced method of symbolic evaluation can be applied to program testing situations with results close to those of formal correctness proofs?but without the high cost.
J.C. King, J.A. Darringer, "Applications of Symbolic Execution to Program Testing", Computer, vol. 11, no. , pp. 51-60, April 1978, doi:10.1109/C-M.1978.218139