%0 Journal Article %A Zelinka, Bohdan %T Tolerances on monounary algebras %J Czechoslovak Mathematical Journal %D 1984 %P 298-304 %V 34 %N 2 %U http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1984.101951/ %R 10.21136/CMJ.1984.101951 %G en %F 10_21136_CMJ_1984_101951