@article{JDM_1925__33_145688,
     author = {Almar Naess},
     title = {Zur {Theorie} der zweifach skalaren {Vektoren.}},
     journal = {Jahresbericht der Deutschen Mathematiker-Vereinigung},
     pages = {139--146},
     publisher = {mathdoc},
     volume = {33},
     year = {1925},
     zbl = {50.0674.02},
     url = {http://geodesic.mathdoc.fr/item/JDM_1925__33_145688/}
}