@article{AMLG_1981__21_137977,
     author = {Urs Oswald},
     title = {Inequivalence of the fragments of new foundations.},
     journal = {Archiv f\"ur mathematische Logik und Grundlagenforschung},
     pages = {77--82},
     publisher = {mathdoc},
     volume = {21},
     year = {1981},
     zbl = {0468.03034},
     url = {http://geodesic.mathdoc.fr/item/AMLG_1981__21_137977/}
}