@article{1256047605, author = {Stahl, Stanley H.}, title = {Intensional sets}, journal = {Illinois J. Math.}, volume = {24}, number = {4}, year = {1980}, pages = { 379-381}, language = {en}, url = {http://dml.mathdoc.fr/item/1256047605} }
Stahl, Stanley H. Intensional sets. Illinois J. Math., Tome 24 (1980) no. 4, pp. 379-381. http://gdmltest.u-ga.fr/item/1256047605/