@article{10_21136_CMJ_1988_102254,
     author = {Chajda, Ivan},
     title = {Algebras whose principal congruences form a sublattice of the congruence lattice},
     journal = {Czechoslovak Mathematical Journal},
     pages = {585--588},
     publisher = {mathdoc},
     volume = {38},
     number = {4},
     year = {1988},
     doi = {10.21136/CMJ.1988.102254},
     mrnumber = {962902},
     zbl = {0668.08003},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1988.102254/}
}