%0 Journal Article
%A J. Steinig
%T Some Trigonometric Inequalities.
%J Elemente der Mathematik
%D 1972
%P 121-128
%V 27
%I mathdoc
%U http://geodesic.mathdoc.fr/item/ELMA_1972__27_141078/
%F ELMA_1972__27_141078