@article{01960268, title = {Rational approximations of }, journal = {Mathematica Pannonica}, volume = {13}, year = {2002}, pages = {23-30}, zbl = {1017.11035}, language = {en}, url = {http://dml.mathdoc.fr/item/01960268} }
Kopetzky, Hans Günther; Schnitzer, Franz Josef. Rational approximations of . Mathematica Pannonica, Tome 13 (2002) pp. 23-30. http://gdmltest.u-ga.fr/item/01960268/