TY  - JOUR
AU  - G. V. Osinnikova
AU  - I. N. Sergeev
TI  - The unattainability of central indices in a class of regular systems
JO  - Vestnik Moskovskogo universiteta. Matematika, mehanika
PY  - 1987
SP  - 39
EP  - 44
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/VMUMM_1987_4_a9/
LA  - ru
ID  - VMUMM_1987_4_a9
ER  -