@article{GDZPPN002082403,
title = {A generalization of Nagel's middlespoint.},
journal = {Elemente der Mathematik},
volume = {45},
year = {1990},
pages = {14-18},
zbl = {0701.51009},
url = {http://dml.mathdoc.fr/item/GDZPPN002082403}
}
Eddy, R.H. A generalization of Nagel's middlespoint.. Elemente der Mathematik, Tome 45 (1990) pp. 14-18. http://gdmltest.u-ga.fr/item/GDZPPN002082403/