TY  - JOUR
AU  - V. A. Roman'kov
TI  - Unsolvability of the problem of endomorphic reducibility in
JO  - Algebra i logika
PY  - 1977
SP  - 457
EP  - 471
VL  - 16
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AL_1977_16_4_a7/
LA  - ru
ID  - AL_1977_16_4_a7
ER  -