%0 Journal Article %A I. I. Ibragimov %A F. G. Nasibov %T The estimation of the best approximation of a summable function on the real axis by means of entire functions of finite degree %J Doklady Akademii Nauk %D 1970 %P 1013-1016 %V 194 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1970_194_5_a6/ %G ru %F DAN_1970_194_5_a6