@article{JDM_1934__44_146055,
     author = {L. Bieberbach},
     title = {Die {Kunst} des {Zitierens.} {Ein} offener {Brief} an {Hern} {Harald} {Bohr} in {Kobenhavn.}},
     journal = {Jahresbericht der Deutschen Mathematiker-Vereinigung},
     pages = {1--3},
     publisher = {mathdoc},
     volume = {44},
     year = {1934},
     zbl = {60.0033.05},
     url = {http://geodesic.mathdoc.fr/item/JDM_1934__44_146055/}
}