%0 Journal Article
%A Yang, Zi-Xiao
%A Li, Bu-Xi
%T On restricted derivative approximation
%J Compositio Mathematica
%D 1990
%P 327-331
%V 74
%N 3
%I Kluwer Academic Publishers
%U http://www.numdam.org/item/CM_1990__74_3_327_0/
%G en
%F CM_1990__74_3_327_0