@article{GDZPPN002034832,
title = {The Lehmus inequality.},
journal = {Aequationes mathematicae},
volume = {28},
year = {1985},
pages = {4-12},
zbl = {0554.51010},
url = {http://dml.mathdoc.fr/item/GDZPPN002034832}
}
Coxeter, H.S.M. The Lehmus inequality.. Aequationes mathematicae, Tome 28 (1985) pp. 4-12. http://gdmltest.u-ga.fr/item/GDZPPN002034832/