@article{ELMA_1963__18_140779,
     author = {J. Steinig},
     title = {Inequalities {Concerning} the {Inradius} and {Circumradius} of a {Triangle.}},
     journal = {Elemente der Mathematik},
     pages = {127--131},
     publisher = {mathdoc},
     volume = {18},
     year = {1963},
     zbl = {0116.12907},
     url = {http://geodesic.mathdoc.fr/item/ELMA_1963__18_140779/}
}