@article{GDZPPN002082152,
title = {A pair of general triangle inequalities.},
journal = {Elemente der Mathematik},
volume = {44},
year = {1989},
pages = {41-47},
zbl = {0714.51012},
url = {http://dml.mathdoc.fr/item/GDZPPN002082152}
}
Gmeiner, W. A pair of general triangle inequalities.. Elemente der Mathematik, Tome 44 (1989) pp. 41-47. http://gdmltest.u-ga.fr/item/GDZPPN002082152/