@article{GDZPPN002306425,
title = {Formulas for Some Diophantine Approximation Constants.},
journal = {Mathematische Annalen},
volume = {196},
year = {1972},
pages = {182-188},
zbl = {0225.10032},
url = {http://dml.mathdoc.fr/item/GDZPPN002306425}
}
Cusick, T.W. Formulas for Some Diophantine Approximation Constants.. Mathematische Annalen, Tome 196 (1972) pp. 182-188. http://gdmltest.u-ga.fr/item/GDZPPN002306425/