@article{JRAM_1977__0293_0294_151912,
     author = {F.J. Schnitzer and H.G. Kopetzky},
     title = {Bemerkungen zu einem {Approximationssatz} f\"ur regelm\"a{\ss}ige {Kettenbr\"uche.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {437--440},
     publisher = {mathdoc},
     volume = {0293_0294},
     year = {1977},
     zbl = {0349.10023},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1977__0293_0294_151912/}
}