TY  - JOUR
AU  - S. V. Sizyi
TI  - Critical theories of some classes of graphs and unary
JO  - Algebra i logika
PY  - 1989
SP  - 454
EP  - 462
VL  - 28
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AL_1989_28_4_a6/
LA  - ru
ID  - AL_1989_28_4_a6
ER  -