%0 Journal Article %A Braune, Erhard %T On the approximation of π by special algebraic numbers %J Glasgow mathematical journal %D 1980 %P 51-56 %V 21 %N 1 %U http://geodesic.mathdoc.fr/articles/10.1017/S0017089500003979/ %R 10.1017/S0017089500003979 %F 10_1017_S0017089500003979