@article{10_21136_CMJ_1982_101788,
     author = {Chajda, Ivan and Nieminen, Juhani},
     title = {Direct decomposability of tolerances on lattices, semilattices and quasilattices},
     journal = {Czechoslovak Mathematical Journal},
     pages = {110--115},
     publisher = {mathdoc},
     volume = {32},
     number = {1},
     year = {1982},
     doi = {10.21136/CMJ.1982.101788},
     mrnumber = {646716},
     zbl = {0491.08003},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1982.101788/}
}