@article{1093870577, author = {Montagna, Franco}, title = {The predicate modal logic of provability.}, journal = {Notre Dame J. Formal Logic}, volume = {25}, number = {1}, year = {1984}, pages = { 179-189}, language = {en}, url = {http://dml.mathdoc.fr/item/1093870577} }
Montagna, Franco. The predicate modal logic of provability.. Notre Dame J. Formal Logic, Tome 25 (1984) no. 1, pp. 179-189. http://gdmltest.u-ga.fr/item/1093870577/