%0 Journal Article %A Chajda, Ivan %A Nieminen, Juhani %T Direct decomposability of tolerances on lattices, semilattices and quasilattices %J Czechoslovak Mathematical Journal %D 1982 %P 110-115 %V 32 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1982.101788/ %R 10.21136/CMJ.1982.101788 %G en %F 10_21136_CMJ_1982_101788