Simon Helsen. Bisimilarity for the Region Calculus. Higher-Order and Symbolic Computation, 17(4):347-394, 2004. [doi]
@article{Helsen04, title = {Bisimilarity for the Region Calculus}, author = {Simon Helsen}, year = {2004}, url = {http://springerlink.metapress.com/index/10.1007/s10990-004-4868-x}, researchr = {https://researchr.org/publication/Helsen04}, cites = {0}, citedby = {0}, journal = {Higher-Order and Symbolic Computation}, volume = {17}, number = {4}, pages = {347-394}, }