%0 Journal Article %A George A. Tsintsifas %T A generalization of a two triangle inequality. %J Elemente der Mathematik %D 1987 %P 150-153 %V 42 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/ELMA_1987__42_4_141415/ %F ELMA_1987__42_4_141415