@article{10_21136_CMJ_1986_102071,
     author = {Janowitz, Melvin F.},
     title = {Tolerances and congruences on lattices},
     journal = {Czechoslovak Mathematical Journal},
     pages = {108--115},
     publisher = {mathdoc},
     volume = {36},
     number = {1},
     year = {1986},
     doi = {10.21136/CMJ.1986.102071},
     mrnumber = {822874},
     zbl = {0598.06004},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1986.102071/}
}