@article{1183732462,
author = {Quine, W. V.},
title = {Unification of Universes in Set Theory},
journal = {J. Symbolic Logic},
volume = {21},
number = {1},
year = {1956},
pages = { 267-279},
language = {en},
url = {http://dml.mathdoc.fr/item/1183732462}
}
Quine, W. V. Unification of Universes in Set Theory. J. Symbolic Logic, Tome 21 (1956) no. 1, pp. 267-279. http://gdmltest.u-ga.fr/item/1183732462/