TY  - JOUR
AU  - Solomon Feferman
TI  - Two notes on abstract model theory. I. Properties invariant on the range of definable relations between structures
JO  - Fundamenta Mathematicae
PY  - 1974
SP  - 153
EP  - 165
VL  - 82
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/fm-82-2-153-165/
DO  - 10.4064/fm-82-2-153-165
LA  - en
ID  - 10_4064_fm_82_2_153_165
ER  -