@article{MAN_1903__56_158056,
     author = {P. Gordan},
     title = {Das simultane {System} von zwei quadratischen quatern\"aren {Formen}},
     journal = {Mathematische Annalen},
     pages = {1--48},
     year = {1903},
     volume = {56},
     zbl = {33.0130.02},
     url = {http://geodesic.mathdoc.fr/item/MAN_1903__56_158056/}
}