TY  - JOUR
AU  - K. N. Lungu
TI  - On best approximations by rational functions with a~fixed number of poles
JO  - Sbornik. Mathematics
PY  - 1971
SP  - 313
EP  - 324
VL  - 15
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SM_1971_15_2_a7/
LA  - en
ID  - SM_1971_15_2_a7
ER  -