Some considerations for using approximate optimal queries

K. L. Kwok
1987 Proceedings of the 10th annual international ACM SIGIR conference on Research and development in information retrieval - SIGIR '87  
An optimal query has been defined as one which will recover all the known relevant
doi:10.1145/42005.42008 dblp:conf/sigir/Kwok87 fatcat:5lmqpogqjffhnbk2u7fcll47kq