%0 Journal Article %A Juha Honkala %T On number systems with negative digits %J Annales Fennici Mathematici %D 1989 %P 149-156 %V 14 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.5186/aasfm.1989.1411/ %R 10.5186/aasfm.1989.1411 %G en %F AFM_1989_14_1_a13