TY  - JOUR
AU  - Yu. G. Penzin
TI  - Undecidability of fields of rational functions over fields of
JO  - Algebra i logika
PY  - 1973
SP  - 205
EP  - 210
VL  - 12
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AL_1973_12_2_a5/
LA  - ru
ID  - AL_1973_12_2_a5
ER  -