@article{ELMA_1989__44_3_141457,
     author = {Roland H. Eddy},
     title = {A {Desarguesian} dual for {Nagel's} middlespoint.},
     journal = {Elemente der Mathematik},
     pages = {79--80},
     publisher = {mathdoc},
     volume = {44},
     number = {3},
     year = {1989},
     zbl = {0701.51008},
     url = {http://geodesic.mathdoc.fr/item/ELMA_1989__44_3_141457/}
}