Peter J. Denning Douglas Comer David Gries Michael C. Mulder Allen B. Tucker A. Joe Turner Paul R. Young Computing as a Discipline. 9-23 1989 32 Commun. ACM 1 db/journals/cacm/cacm32.html#DenningCGMTTY89 http://doi.acm.org/10.1145/63238.63239