%0 Journal Article %A Močkoř, Jiří %T Semivaluations and $d$-groups %J Czechoslovak Mathematical Journal %D 1982 %P 77-89 %V 32 %N 1 %U http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1982.101785/ %R 10.21136/CMJ.1982.101785 %G en %F 10_21136_CMJ_1982_101785