%0 Journal Article %A Milosav M. Marjanović %A Zoran Kadelburg %T Number systems characterized by their operative properties %J The Teaching of Mathematics %D 2019 %P 43 %V XXII %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/TM2_2019_XXII_2_a0/ %G en %F TM2_2019_XXII_2_a0