%0 Journal Article %A P. Erdös %A I. Ruzsa %A A. Sárközi %T On the number of solutions of f(n) = a for additive functions %J Acta Arithmetica %D 1973 %P 1-9 %V 24 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa-24-1-1-9/ %R 10.4064/aa-24-1-1-9 %G en %F 10_4064_aa_24_1_1_9