%0 Journal Article %A Tonko Tonkov %T On the average length of finite continued fractions %J Acta Arithmetica %D 1974 %P 47-57 %V 26 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa-26-1-47-57/ %R 10.4064/aa-26-1-47-57 %G en %F 10_4064_aa_26_1_47_57