%0 Journal Article
%A Nguyen Thi Thien Hoa
%T Rolle's theorem for differential operators, and some extremal
%J Doklady Akademii Nauk
%D 1987
%P 1313-1318
%V 295
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1987_295_6_a6/
%G ru
%F DAN_1987_295_6_a6