@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/