%0 Journal Article %A Ch. Davis %T Properties of mappings of certain Chebyshev systems %J Doklady Akademii Nauk %D 1967 %P 280-283 %V 175 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1967_175_2_a5/ %G ru %F DAN_1967_175_2_a5