@article{bwmeta1.element.bwnjournal-article-fmv82i1p10bwm,
author = {Solomon Feferman},
title = {Two notes on abstract model theory. I. Properties invariant on the range of definable relations between structures},
journal = {Fundamenta Mathematicae},
volume = {85},
year = {1974},
pages = {153-165},
zbl = {0296.02026},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-fmv82i1p10bwm}
}
Feferman, Solomon. Two notes on abstract model theory. I. Properties invariant on the range of definable relations between structures. Fundamenta Mathematicae, Tome 85 (1974) pp. 153-165. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-fmv82i1p10bwm/