@article{MAN_1882__19_156998,
     author = {Schur},
     title = {Ueber besondere {Lagen} zweier {Tetraeder} .},
     journal = {Mathematische Annalen},
     pages = {429--432},
     year = {1882},
     volume = {19},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/MAN_1882__19_156998/}
}