@article{bwmeta1.element.bwnjournal-article-fmv87i1p22bwm,
author = {A. Ostaszewski},
title = {On the descriptive sot theory of the lexicographic square},
journal = {Fundamenta Mathematicae},
volume = {89},
year = {1975},
pages = {261-281},
zbl = {0303.54015},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-fmv87i1p22bwm}
}
Ostaszewski, A. On the descriptive sot theory of the lexicographic square. Fundamenta Mathematicae, Tome 89 (1975) pp. 261-281. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-fmv87i1p22bwm/