Matteo Cristani. The Complexity of Reasoning about Spatial Congruence. J. Artif. Intell. Res. (JAIR), 11:361-390, 1999. [doi]
@article{Cristani99, title = {The Complexity of Reasoning about Spatial Congruence}, author = {Matteo Cristani}, year = {1999}, url = {http://www.cs.washington.edu/research/jair/abstracts/cristani99a.html}, researchr = {https://researchr.org/publication/Cristani99}, cites = {0}, citedby = {0}, journal = {J. Artif. Intell. Res. (JAIR)}, volume = {11}, pages = {361-390}, }