%0 Journal Article %A K. N. Lungu %T Best approximations by rational functions with respect to the Hausdorff distance %J Matematičeskie zametki %D 1972 %P 491-498 %V 11 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZM_1972_11_5_a2/ %G ru %F MZM_1972_11_5_a2