db/journals/jacm/AhoDU71.html Alfred V. Aho Peter J. Denning Jeffrey D. Ullman Principles of Optimal Page Replacement. 80-93 1971 18 J. ACM 1 http://doi.acm.org/10.1145/321623.321632 db/journals/jacm/jacm18.html#AhoDU71 JACM/18/P0080.pdf