http://doi.acm.org/10.1145/156883.156888 db/journals/sigmod/ImielinskiB93.html Tomasz Imielinski B. R. Badrinath Data Management for Mobile Computing. 34-39 sigmodR/22-1/P034.pdf 1993 22 SIGMOD Record 1 db/journals/sigmod/sigmod22.html#ImielinskiB93