@article{1093891101, author = {Sanchis, Luis E.}, title = {Formally defined operations in Kripke models.}, journal = {Notre Dame J. Formal Logic}, volume = {14}, number = {1}, year = {1973}, pages = { 467-480}, language = {en}, url = {http://dml.mathdoc.fr/item/1093891101} }
Sanchis, Luis E. Formally defined operations in Kripke models.. Notre Dame J. Formal Logic, Tome 14 (1973) no. 1, pp. 467-480. http://gdmltest.u-ga.fr/item/1093891101/