Everett, R. R. (1951). "The Whirlwind I computer". Papers and discussions presented at the Dec. 10-12, 1951, joint AIEE-IRE computer conference: Review of electronic digital computers on - AIEE-IRE '51. ACM. pp. 70–74. doi:10.1145/1434770.1434781. Retrieved 2020-02-29.
Everett, R. R. (1951). "The Whirlwind I computer". Papers and discussions presented at the Dec. 10-12, 1951, joint AIEE-IRE computer conference: Review of electronic digital computers on - AIEE-IRE '51. ACM. pp. 70–74. doi:10.1145/1434770.1434781. Retrieved 2020-02-29.
Reinhardt, Helmut (1996). Automatisierungstechnik : theoretische und gerätetechnische Grundlagen, SPS (in German). Berlin: Springer. p. 241. ISBN3-540-60626-2. OCLC68764206.