%0 Journal Article %A Yu. S. Vasil'ev %T Approximation by splines with nonfixed knots on a~half-axis depending on the location of the knots %J Trudy Instituta matematiki i mehaniki %D 1992 %P 57-69 %V 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/TIMM_1992_2_a5/ %G ru %F TIMM_1992_2_a5