TY  - JOUR
AU  - S. Jaśkowski
TI  - Undecidability of first order sentences in the theory of free groupoids
JO  - Fundamenta Mathematicae
PY  - 1956
SP  - 36
EP  - 45
VL  - 43
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/fm-43-1-36-45/
DO  - 10.4064/fm-43-1-36-45
LA  - en
ID  - 10_4064_fm_43_1_36_45
ER  -