@article{1093958154, author = {Bull, R. A.}, title = {A modal extension of intuitionist logic.}, journal = {Notre Dame J. Formal Logic}, volume = {6}, number = {1}, year = {1965}, pages = { 142-146}, language = {en}, url = {http://dml.mathdoc.fr/item/1093958154} }
Bull, R. A. A modal extension of intuitionist logic.. Notre Dame J. Formal Logic, Tome 6 (1965) no. 1, pp. 142-146. http://gdmltest.u-ga.fr/item/1093958154/