%0 Journal Article %A Abian, Alexander %T On a useful economy in the formation of Riemann sums %J Mathematica slovaca %D 1978 %P 247-252 %V 28 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/MASLO_1978__28_3_a3/ %G en %F MASLO_1978__28_3_a3