%0 Journal Article %A Man-Duen Choi %A George A. Elliot %T Density of the self-adjoint elements with finite spectrum in an irrational rotation C*-algebra. %J Mathematica Scandinavica %D 1990 %P 73-86 %V 67 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/MS2_1990__67_2_167122/ %F MS2_1990__67_2_167122