@article{10_21136_CPM_1974_117860,
     author = {Chajda, Ivan and Zelinka, Bohdan},
     title = {Tolerance relation on lattices},
     journal = {\v{C}asopis pro p\v{e}stov\'an{\'\i} matematiky},
     pages = {394--399},
     publisher = {mathdoc},
     volume = {099},
     number = {4},
     year = {1974},
     doi = {10.21136/CPM.1974.117860},
     mrnumber = {0360380},
     zbl = {0297.06001},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CPM.1974.117860/}
}