%0 Journal Article %A A. I. Vorob'ev %T Characterizing quasiconvex functions in terms of the Kronrod's tree of a~function %J Sbornik. Mathematics %D 2014 %P 777-780 %V 205 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_2014_205_6_a1/ %G en %F SM_2014_205_6_a1