@article{1183739046,
author = {Shore, Richard A.},
title = {$\Sigma\_n$ Sets which are $\Delta\_n$-Incomparable (Uniformly)},
journal = {J. Symbolic Logic},
volume = {39},
number = {1},
year = {1974},
pages = { 295-304},
language = {en},
url = {http://dml.mathdoc.fr/item/1183739046}
}
Shore, Richard A. $\Sigma_n$ Sets which are $\Delta_n$-Incomparable (Uniformly). J. Symbolic Logic, Tome 39 (1974) no. 1, pp. 295-304. http://gdmltest.u-ga.fr/item/1183739046/