@article{MAN_1937__114_159907,
     author = {E. Hagemann},
     title = {Das {Reziprokentheorem} in beliebigen linearen {Koordinatenr\"aumen}},
     journal = {Mathematische Annalen},
     pages = {126--143},
     publisher = {mathdoc},
     volume = {114},
     year = {1937},
     zbl = {0016.11801},
     url = {http://geodesic.mathdoc.fr/item/MAN_1937__114_159907/}
}