@article{JDM_1938__48_146184,
     author = {F. v. Krbek},
     title = {Nichtlineare nichtholonome {Bindungen} in der {Mechanik.}},
     journal = {Jahresbericht der Deutschen Mathematiker-Vereinigung},
     pages = {165--168},
     publisher = {mathdoc},
     volume = {48},
     year = {1938},
     zbl = {64.0797.03},
     url = {http://geodesic.mathdoc.fr/item/JDM_1938__48_146184/}
}