Peter Schäuble, Beat Wüthrich. On the Expressive Power of Query Languages. ACM Trans. Inf. Syst., 12(1):69-91, 1994. [doi]
@article{SchableW94,
title = {On the Expressive Power of Query Languages},
author = {Peter Schäuble and Beat Wüthrich},
year = {1994},
doi = {10.1145/174608.174611},
url = {http://doi.acm.org/10.1145/174608.174611},
tags = {rule-based, relational algebra, type system, algebraic specification, Datalog, query language},
researchr = {https://researchr.org/publication/SchableW94},
cites = {0},
citedby = {0},
journal = {ACM Trans. Inf. Syst.},
volume = {12},
number = {1},
pages = {69-91},
}