%0 Journal Article %A Chajda, Ivan %T A characterization of arithmetical varieties by two-element subsets %J Czechoslovak Mathematical Journal %D 1994 %P 521-522 %V 44 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1994.128481/ %R 10.21136/CMJ.1994.128481 %G en %F 10_21136_CMJ_1994_128481