@article{GDZPPN002045265,
title = {Inequivalence of the fragments of new foundations.},
journal = {Archiv f\"ur mathematische Logik und Grundlagenforschung},
volume = {21},
year = {1981},
pages = {77-82},
zbl = {0468.03034},
url = {http://dml.mathdoc.fr/item/GDZPPN002045265}
}
Oswald, Urs. Inequivalence of the fragments of new foundations.. Archiv für mathematische Logik und Grundlagenforschung, Tome 21 (1981) pp. 77-82. http://gdmltest.u-ga.fr/item/GDZPPN002045265/