%0 Journal Article
%A Vijay Gupta
%A Gancho Tachev
%T Some Results on Post-Widder Operators Preserving Test Function $x^r$
%J Kragujevac Journal of Mathematics
%D 2022
%P 149 
%V 46
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/KJM_2022_46_1_a11/
%G en
%F KJM_2022_46_1_a11