@article{10_21136_CMJ_1963_100584,
     author = {Havel, V\'aclav},
     title = {On semichained refinements of chains in equivalence lattice. {(A} note to a theorem of {O.} {Bor\r{u}vka.)}},
     journal = {Czechoslovak Mathematical Journal},
     pages = {533--538},
     publisher = {mathdoc},
     volume = {13},
     number = {4},
     year = {1963},
     doi = {10.21136/CMJ.1963.100584},
     mrnumber = {0157915},
     zbl = {0135.03102},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1963.100584/}
}