@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/