@article{1093636013,
author = {Crabb\'e, Marcel},
title = {On NFU.},
journal = {Notre Dame J. Formal Logic},
volume = {32},
number = {2},
year = {1991},
pages = { 112-119},
language = {en},
url = {http://dml.mathdoc.fr/item/1093636013}
}
Crabbé, Marcel. On NFU.. Notre Dame J. Formal Logic, Tome 32 (1991) no. 2, pp. 112-119. http://gdmltest.u-ga.fr/item/1093636013/