Borgerson et al (1978) Borgerson, B. R. ; Hanson, M. L.; Hartley, P. A. "The evolution of the Sperry Univac 1100 series: a history, analysis, and projection"
CACM 21(01) January 1978 pp25-43 E A
J. R. Holmevik, (1994) J. R. Holmevik, "Compiling SIMULA: a historical study of technological genesis" pp25-37
UNIVAC and Simula
in [AHC] (1994) Annals of the History of Computing 16(1) Spring 1994 E
Gray et al (2001) Gray, George T. and Smith, Ron Q. "Sperry Rand's Third-Generation Computers 1964-1980" pp3-16 E A
in (2001) IEEE Annals of the History of Computing, 23(1) January 2001 E