TY  - JOUR
AU  - A. L. Lukashov
TI  - Estimates for derivatives of rational functions and the fourth Zolotarev problem
JO  - Algebra i analiz
PY  - 2007
SP  - 122
EP  - 130
VL  - 19
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AA_2007_19_2_a6/
LA  - ru
ID  - AA_2007_19_2_a6
ER  -