@article{GDZPPN002077183, title = {Theorems related to Wallace's (Simson's) Line.}, journal = {Elemente der Mathematik}, volume = {25}, year = {1970}, pages = {28-34}, zbl = {0187.42404}, url = {http://dml.mathdoc.fr/item/GDZPPN002077183} }
Steller, E.T. Theorems related to Wallace's (Simson's) Line.. Elemente der Mathematik, Tome 25 (1970) pp. 28-34. http://gdmltest.u-ga.fr/item/GDZPPN002077183/