@article{MZ_1966__94_170610,
     author = {Werner Krabs},
     title = {Zur verallgemeinerten rationalen {Approximation.}},
     journal = {Mathematische Zeitschrift},
     pages = {84--97},
     publisher = {mathdoc},
     volume = {94},
     year = {1966},
     zbl = {0147.32002},
     url = {http://geodesic.mathdoc.fr/item/MZ_1966__94_170610/}
}