%0 Journal Article %A S. M. Markov %T Extended Interval Arithmetic Involving Infinite Intervals %J Mathematica balkanica %D 1992 %P 269 %V 6 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/MABA_1992_6_3_a10/ %F MABA_1992_6_3_a10