@article{JDM_1930__39_145864,
     author = {Adalbert Duschek},
     title = {\"Uber symbolfreie {Vektorrechnung.}},
     journal = {Jahresbericht der Deutschen Mathematiker-Vereinigung},
     pages = {269--277},
     publisher = {mathdoc},
     volume = {39},
     year = {1930},
     zbl = {56.0664.01},
     url = {http://geodesic.mathdoc.fr/item/JDM_1930__39_145864/}
}