%0 Journal Article %A J. MikusiƄski %T Hypernumbers. Part I. Algebra %J Studia Mathematica %D 1983 %P 3-16 %V 77 %N 1 %U http://geodesic.mathdoc.fr/articles/10.4064/sm-77-1-3-16/ %R 10.4064/sm-77-1-3-16 %G en %F 10_4064_sm_77_1_3_16