@article{GDZPPN002477653,
title = {Lower Bound for a Diophantine Approximation Function.},
journal = {Monatshefte f\"ur Mathematik},
volume = {75},
year = {1971},
pages = {398-401},
zbl = {0238.10017},
url = {http://dml.mathdoc.fr/item/GDZPPN002477653}
}
Cusick, T.W. Lower Bound for a Diophantine Approximation Function.. Monatshefte für Mathematik, Tome 75 (1971) pp. 398-401. http://gdmltest.u-ga.fr/item/GDZPPN002477653/