@article{JDM_1927__36_145759,
     author = {Alexander Ostrowski},
     title = {Mathematische {Miszellen.} {IX.} {Notiz} zur {Theorie} der {Diophantischen} {Approximationen.}},
     journal = {Jahresbericht der Deutschen Mathematiker-Vereinigung},
     pages = {178--180},
     publisher = {mathdoc},
     volume = {36},
     year = {1927},
     zbl = {53.0165.02},
     url = {http://geodesic.mathdoc.fr/item/JDM_1927__36_145759/}
}