%0 Journal Article %A Verica Milutinović %T An algorithm for calculation of (+, *) - expressions with natural numbers %J Kragujevac Journal of Mathematics %D 2003 %P 81 - 90 %V 25 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/KJM_2003_25_1_a7/ %F KJM_2003_25_1_a7