@article{DBLP:journals/cacm/Yao77,
author = {S. Bing Yao},
title = {Approximating the Number of Accesses in Database Organizations},
journal = {Commun. ACM},
volume = {20},
number = {4},
year = {1977},
pages = {260-261},
ee = {http://doi.acm.org/10.1145/359461.359475},
bibsource = {DBLP, http://dblp.uni-trier.de}
}