@article{GDZPPN002082233, title = {A Desarguesian dual for Nagel's middlespoint.}, journal = {Elemente der Mathematik}, volume = {44}, year = {1989}, pages = {79-80}, zbl = {0701.51008}, url = {http://dml.mathdoc.fr/item/GDZPPN002082233} }
Eddy, Roland H. A Desarguesian dual for Nagel's middlespoint.. Elemente der Mathematik, Tome 44 (1989) pp. 79-80. http://gdmltest.u-ga.fr/item/GDZPPN002082233/