%0 Journal Article %A Haukkanen, P. %T Rational arithmetical functions of order (2,1) with respect to regular convolutions. %J Portugaliae mathematica %D 1999 %P 329-343 %V 56 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/PORMA_1999__56_3_48440/ %G en %F PORMA_1999__56_3_48440