@article{1183736310,
author = {Geiser, James R.},
title = {Nonstandard Logic},
journal = {J. Symbolic Logic},
volume = {33},
number = {1},
year = {1968},
pages = { 236-250},
language = {en},
url = {http://dml.mathdoc.fr/item/1183736310}
}
Geiser, James R. Nonstandard Logic. J. Symbolic Logic, Tome 33 (1968) no. 1, pp. 236-250. http://gdmltest.u-ga.fr/item/1183736310/