%0 Journal Article %A V. V. Ivanov %T Optimal precison approximation of functions with singular points unknow in advance %J Informatics and Automation %D 1987 %P 120-121 %V 180 %I mathdoc %U http://geodesic.mathdoc.fr/item/TRSPY_1987_180_a66/ %G ru %F TRSPY_1987_180_a66