@article{1093635152,
author = {van Benthem, Johan},
title = {Logical constants across varying types.},
journal = {Notre Dame J. Formal Logic},
volume = {30},
number = {2},
year = {1989},
pages = { 315-342},
language = {en},
url = {http://dml.mathdoc.fr/item/1093635152}
}
van Benthem, Johan. Logical constants across varying types.. Notre Dame J. Formal Logic, Tome 30 (1989) no. 2, pp. 315-342. http://gdmltest.u-ga.fr/item/1093635152/