@article{JRAM_1985__362_152763,
     author = {Jingcheng Tong},
     title = {On two theorems of {Kopetzky} and {Schnitzer} on the approximation of continued fractions.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {1--3},
     publisher = {mathdoc},
     volume = {362},
     year = {1985},
     zbl = {0568.10019},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1985__362_152763/}
}