%0 Journal Article %A Laugwitz, Detlef %T Bolzano's infinitesimal numbers %J Czechoslovak Mathematical Journal %D 1982 %P 667-670 %V 32 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1982.101845/ %R 10.21136/CMJ.1982.101845 %G en %F 10_21136_CMJ_1982_101845