TY  - JOUR
AU  - G. N. Kobzev
TI  - The complete ${\rm btt}$-degree
JO  - Algebra i logika
PY  - 1974
SP  - 22
EP  - 25
VL  - 13
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AL_1974_13_1_a2/
LA  - ru
ID  - AL_1974_13_1_a2
ER  -