%0 Journal Article %A J. Loxton %A Alfred van der Poorten %T An awful problem about integers in base four %J Acta Arithmetica %D 1987 %P 193-203 %V 49 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa-49-2-193-203/ %R 10.4064/aa-49-2-193-203 %G en %F 10_4064_aa_49_2_193_203