TY  - JOUR
AU  - S. G. Ivanov
TI  - Standard and dually standard elements of the lattice of subgroups
JO  - Algebra i logika
PY  - 1969
SP  - 440
EP  - 446
VL  - 8
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AL_1969_8_4_a2/
LA  - ru
ID  - AL_1969_8_4_a2
ER  -