http://dx.doi.org/10.1007/3-540-49257-7_8 conf/icdt/99 Danièle Gardy Laurent Némirovski Urn Models and Yao's Formula. 100-112 1999 ICDT http://link.springer.de/link/service/series/0558/bibs/1540/15400100.htm db/conf/icdt/icdt99.html#GardyN99 ... journals/cacm/Cardenas75 journals/debu/Christodoulakis82 journals/is/Christodoulakis83 ... conf/vldb/GardarinGT95 ... ... ... ... ... journals/cacm/Yao77