%0 Journal Article %A A. R. Alimov %T Preservation of approximative properties of Chebyshev sets and suns in a plane %J Vestnik Moskovskogo universiteta. Matematika, mehanika %D 2008 %P 46-49 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/VMUMM_2008_5_a7/ %G ru %F VMUMM_2008_5_a7