%0 Journal Article
%A V. A. Zalgaller
%T On a~question of Bellman
%J Zapiski Nauchnykh Seminarov POMI
%D 2003
%P 54-86
%V 299
%I mathdoc
%U http://geodesic.mathdoc.fr/item/ZNSL_2003_299_a4/
%G ru
%F ZNSL_2003_299_a4