%0 Journal Article %A M. D. Kalashnikov %A G. P. Gubanov %T Polynomials of best (quadratic) approximation at a given system of points %J Doklady Akademii Nauk %D 1963 %P 978-980 %V 150 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1963_150_5_a5/ %G ru %F DAN_1963_150_5_a5