Brennan, R. D., & Sano, H. "PACTOLUS, a digital analog simulation program for the IBM 1620" Vol 1 pp299-312

[AFIPS JCC 26] (1964) [AFIPS JCC 26] Proceedings of the 1964 Fall Joint Computer Conference FJCC 1964  

Languages mentioned PACTOLUS {1964} Digital simulation language