@article{GDZPPN002044579,
title = {On two complete sets in the analytical and the arithmetical hierarchies.},
journal = {Archiv f\"ur mathematische Logik und Grundlagenforschung},
volume = {17},
year = {1975},
pages = {81-84},
zbl = {0317.02048},
url = {http://dml.mathdoc.fr/item/GDZPPN002044579}
}
Vinner, Shlomo. On two complete sets in the analytical and the arithmetical hierarchies.. Archiv für mathematische Logik und Grundlagenforschung, Tome 17 (1975) pp. 81-84. http://gdmltest.u-ga.fr/item/GDZPPN002044579/