@article{1183743986, author = {Bianconi, Ricardo}, title = {On Sets $\forall$-Definable From Pfaffian Functions}, journal = {J. Symbolic Logic}, volume = {57}, number = {1}, year = {1992}, pages = { 688-697}, language = {en}, url = {http://dml.mathdoc.fr/item/1183743986} }
Bianconi, Ricardo. On Sets $\forall$-Definable From Pfaffian Functions. J. Symbolic Logic, Tome 57 (1992) no. 1, pp. 688-697. http://gdmltest.u-ga.fr/item/1183743986/