TY  - JOUR
AU  - A. B. Ugol'nikov
TI  - Depth of formulas in some classes of $k$-valued logic
JO  - Vestnik Moskovskogo universiteta. Matematika, mehanika
PY  - 1991
SP  - 44
EP  - 47
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/VMUMM_1991_4_a10/
LA  - ru
ID  - VMUMM_1991_4_a10
ER  -