@article{GDZPPN002045583,
title = {R.E. degrees of continuous functionals.},
journal = {Archiv f\"ur mathematische Logik und Grundlagenforschung},
volume = {23},
year = {1983},
pages = {79-98},
zbl = {0527.03028},
url = {http://dml.mathdoc.fr/item/GDZPPN002045583}
}
Normann, Dag. R.E. degrees of continuous functionals.. Archiv für mathematische Logik und Grundlagenforschung, Tome 23 (1983) pp. 79-98. http://gdmltest.u-ga.fr/item/GDZPPN002045583/