@article{10_21136_CMJ_1994_128487,
     author = {Machala, Franti\v{s}ek},
     title = {Contexts and sublattices of concept lattices},
     journal = {Czechoslovak Mathematical Journal},
     pages = {757--762},
     year = {1994},
     volume = {44},
     number = {4},
     doi = {10.21136/CMJ.1994.128487},
     mrnumber = {1295148},
     zbl = {0816.06006},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1994.128487/}
}