TY  - JOUR
AU  - V. M. Sel'kin
TI  - On one property of the product of non-identity formations
JO  - Problemy fiziki, matematiki i tehniki
PY  - 2012
SP  - 101
EP  - 104
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/PFMT_2012_1_a18/
LA  - ru
ID  - PFMT_2012_1_a18
ER  -