TY  - JOUR
AU  - Z. I. Kozlova
TI  - An $R$-operation with complete depth of chains over systems of sets of power~$\tau$
JO  - Doklady Akademii Nauk
PY  - 1970
SP  - 521
EP  - 524
VL  - 193
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1970_193_3_a5/
LA  - ru
ID  - DAN_1970_193_3_a5
ER  -