@article{bwmeta1.element.bwnjournal-article-fmv44i3p309bwm,
author = {A. Robinson},
title = {Some problems of definability in the lower predicate calculus},
journal = {Fundamenta Mathematicae},
volume = {44},
year = {1957},
pages = {309-329},
zbl = {0079.00608},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-fmv44i3p309bwm}
}
Robinson, A. Some problems of definability in the lower predicate calculus. Fundamenta Mathematicae, Tome 44 (1957) pp. 309-329. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-fmv44i3p309bwm/