TY  - JOUR
AU  - V. A. Lifshits
TI  - Some reduction classes and undecidable theories
JO  - Zapiski Nauchnykh Seminarov POMI
PY  - 1967
SP  - 65
EP  - 68
VL  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/ZNSL_1967_4_a6/
LA  - ru
ID  - ZNSL_1967_4_a6
ER  -