@article{GDZPPN002075326,
title = {Inequalities Concerning the Inradius and Circumradius of a Triangle.},
journal = {Elemente der Mathematik},
volume = {18},
year = {1963},
pages = {127-131},
zbl = {0116.12907},
url = {http://dml.mathdoc.fr/item/GDZPPN002075326}
}
Steinig, J. Inequalities Concerning the Inradius and Circumradius of a Triangle.. Elemente der Mathematik, Tome 18 (1963) pp. 127-131. http://gdmltest.u-ga.fr/item/GDZPPN002075326/