@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/