@article{1058448674,
author = {Kanamori, Akihiro},
title = {The empty set, the singleton, and the ordered pair},
journal = {Bull. Symbolic Logic},
volume = {09},
number = {1},
year = {2003},
pages = { 273- 298},
language = {en},
url = {http://dml.mathdoc.fr/item/1058448674}
}
Kanamori, Akihiro. The empty set, the singleton, and the ordered pair. Bull. Symbolic Logic, Tome 09 (2003) no. 1, pp. 273- 298. http://gdmltest.u-ga.fr/item/1058448674/