@article{1183738861, author = {Fitting, Melvin}, title = {Model Existence Theorems for Modal and Intuitionistic Logics}, journal = {J. Symbolic Logic}, volume = {38}, number = {1}, year = {1973}, pages = { 613-627}, language = {en}, url = {http://dml.mathdoc.fr/item/1183738861} }
Fitting, Melvin. Model Existence Theorems for Modal and Intuitionistic Logics. J. Symbolic Logic, Tome 38 (1973) no. 1, pp. 613-627. http://gdmltest.u-ga.fr/item/1183738861/