TY  - JOUR
AU  - I. A. Shevchuk
TI  - On co-approximation of monotone functions
JO  - Doklady Akademii Nauk
PY  - 1989
SP  - 537
EP  - 541
VL  - 308
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1989_308_3_a5/
LA  - ru
ID  - DAN_1989_308_3_a5
ER  -