@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/