@article{1102971639, author = {Mansfield, Richard}, title = {Perfect subsets of definable sets of real numbers.}, journal = {Pacific J. Math.}, volume = {35}, number = {3}, year = {1970}, pages = { 451-457}, language = {en}, url = {http://dml.mathdoc.fr/item/1102971639} }
Mansfield, Richard. Perfect subsets of definable sets of real numbers.. Pacific J. Math., Tome 35 (1970) no. 3, pp. 451-457. http://gdmltest.u-ga.fr/item/1102971639/