TY  - JOUR
AU  - A. Robinson
TI  - Some problems of definability in the lower predicate calculus
JO  - Fundamenta Mathematicae
PY  - 1957
SP  - 309
EP  - 329
VL  - 44
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/fm-44-3-309-329/
DO  - 10.4064/fm-44-3-309-329
LA  - en
ID  - 10_4064_fm_44_3_309_329
ER  -