@article{GDZPPN002189925,
title = {A continued fraction proof of Ford's theorem on complex rational approximations.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {272},
year = {1975},
pages = {1-13},
zbl = {0298.10020},
url = {http://dml.mathdoc.fr/item/GDZPPN002189925}
}
Lakein, Richard B. A continued fraction proof of Ford's theorem on complex rational approximations.. Journal für die reine und angewandte Mathematik, Tome 272 (1975) pp. 1-13. http://gdmltest.u-ga.fr/item/GDZPPN002189925/