A new extension of $S4$.
Goldblatt, R. I.
Notre Dame J. Formal Logic, Tome 14 (1973) no. 1, p. 567-574 / Harvested from Project Euclid
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Publié le : 1973-10-14
Classification:  02C10 
@article{1093891112,
     author = {Goldblatt, R. I.},
     title = {A new extension of $S4$.},
     journal = {Notre Dame J. Formal Logic},
     volume = {14},
     number = {1},
     year = {1973},
     pages = { 567-574},
     language = {en},
     url = {http://dml.mathdoc.fr/item/1093891112}
}

Goldblatt, R. I. A new extension of $S4$.. Notre Dame J. Formal Logic, Tome 14 (1973) no. 1, pp.  567-574. http://gdmltest.u-ga.fr/item/1093891112/