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@article{DBLP:journals/gis/Frank96,
author = {Andrew U. Frank},
title = {Qualitative Spatial Reasoning: Cardinal Directions as an
Example},
journal = {International Journal of Geographical Information Science},
volume = {10},
number = {3},
year = {1996},
pages = {269-290},
ee = {http://dx.doi.org/10.1080/02693799608902079},
bibsource = {DBLP, http://dblp.uni-trier.de}
}
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