@article{1183740517,
author = {Manevitz, Larry and Stavi, Jonathan},
title = {$\triangle^0\_2$ Operators and Alternating Sentences in Arithmetic},
journal = {J. Symbolic Logic},
volume = {45},
number = {1},
year = {1980},
pages = { 144-154},
language = {en},
url = {http://dml.mathdoc.fr/item/1183740517}
}
Manevitz, Larry; Stavi, Jonathan. $\triangle^0_2$ Operators and Alternating Sentences in Arithmetic. J. Symbolic Logic, Tome 45 (1980) no. 1, pp. 144-154. http://gdmltest.u-ga.fr/item/1183740517/