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@article{10_4064_cm_41_1_1_12, author = {R. Beazer and D. S. Macnab}, title = {Modal extensions of {Heyting} algebras}, journal = {Colloquium Mathematicum}, pages = {1--12}, publisher = {mathdoc}, volume = {41}, number = {1}, year = {1979}, doi = {10.4064/cm-41-1-1-12}, language = {fr}, url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-41-1-1-12/} }
R. Beazer; D. S. Macnab. Modal extensions of Heyting algebras. Colloquium Mathematicum, Tome 41 (1979) no. 1, pp. 1-12. doi : 10.4064/cm-41-1-1-12. http://geodesic.mathdoc.fr/articles/10.4064/cm-41-1-1-12/
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