@article{DBLP:journals/tods/AbiteboulG91,
author = {Serge Abiteboul and
St{\'e}phane Grumbach},
title = {A Rule-Based Language with Functions and Sets},
journal = {ACM Trans. Database Syst.},
volume = {16},
number = {1},
year = {1991},
pages = {1-30},
ee = {http://doi.acm.org/10.1145/103140.103141},
bibsource = {DBLP, http://dblp.uni-trier.de}
}