@article{ELMA_1990__45_6_141474,
     author = {R.H. Eddy},
     title = {A generalization of {Nagel's} middlespoint.},
     journal = {Elemente der Mathematik},
     pages = {14--18},
     publisher = {mathdoc},
     volume = {45},
     number = {6},
     year = {1990},
     zbl = {0701.51009},
     url = {http://geodesic.mathdoc.fr/item/ELMA_1990__45_6_141474/}
}