@article{1093890629,
author = {Malcolm, Wilfred G.},
title = {Variations in definition of ultraproducts of a family of first order relational structures.},
journal = {Notre Dame J. Formal Logic},
volume = {13},
number = {3},
year = {1972},
pages = { 394-398},
language = {en},
url = {http://dml.mathdoc.fr/item/1093890629}
}
Malcolm, Wilfred G. Variations in definition of ultraproducts of a family of first order relational structures.. Notre Dame J. Formal Logic, Tome 13 (1972) no. 3, pp. 394-398. http://gdmltest.u-ga.fr/item/1093890629/