@article{1096901770,
author = {Arai, Toshiyasu},
title = {Wellfoundedness proofs by means of non-monotonic inductive definitions I: $\Pi$ <sup>0</sup><sub>2</sub>-operators},
journal = {J. Symbolic Logic},
volume = {69},
number = {1},
year = {2004},
pages = { 830-850},
language = {en},
url = {http://dml.mathdoc.fr/item/1096901770}
}
Arai, Toshiyasu. Wellfoundedness proofs by means of non-monotonic inductive definitions I: Π 02-operators. J. Symbolic Logic, Tome 69 (2004) no. 1, pp. 830-850. http://gdmltest.u-ga.fr/item/1096901770/