@article{1183740769, author = {Normann, Dag}, title = {Countable Functionals and the Projective Hierarchy}, journal = {J. Symbolic Logic}, volume = {46}, number = {1}, year = {1981}, pages = { 209-215}, language = {en}, url = {http://dml.mathdoc.fr/item/1183740769} }
Normann, Dag. Countable Functionals and the Projective Hierarchy. J. Symbolic Logic, Tome 46 (1981) no. 1, pp. 209-215. http://gdmltest.u-ga.fr/item/1183740769/