Lisa Hellerstein Krishnan Pillaipakkamnatt Vijay V. Raghavan Dawn Wilkins How many queries are needed to learn? 190-199 1995 conf/stoc/STOC27 STOC http://doi.acm.org/10.1145/225058.225114 db/conf/stoc/stoc1995.html#HellersteinPRW95