TY  - JOUR
AU  - I. Sh. Kalimullin
AU  - M. Kh. Faizrakhmanov
TI  - A hierarchy of classes of families and $n$-low degrees
JO  - Algebra i logika
PY  - 2015
SP  - 536
EP  - 541
VL  - 54
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AL_2015_54_4_a8/
LA  - ru
ID  - AL_2015_54_4_a8
ER  -