Kalervo Järvelin, Timo Niemi, Airi Salminen. The visual query language CQL for transitive and relational computation. Data \& Knowledge Engineering, 35(1):39-51, 2000. [doi]
@article{JarvelinNS00,
title = {The visual query language CQL for transitive and relational computation},
author = {Kalervo Järvelin and Timo Niemi and Airi Salminen},
year = {2000},
doi = {10.1016/S0169-023X(00)00021-5},
url = {http://dx.doi.org/10.1016/S0169-023X(00)00021-5},
tags = {query language},
researchr = {https://researchr.org/publication/JarvelinNS00},
cites = {0},
citedby = {0},
journal = {Data \& Knowledge Engineering},
volume = {35},
number = {1},
pages = {39-51},
}