%0 Journal Article
%A A. Al-Zamel
%A R. Khalil
%T Vector valued Chebechev systems
%J Revista colombiana de matematicas
%D 1989
%P 25-34
%V 23
%N 1-4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/RCM_1989__23_1-4_181821/
%F RCM_1989__23_1-4_181821