@article{BSL_2016_45_3-4_a0,
     author = {{\L}azarz, Marcin},
     title = {Characterization of {Birkhoff{\textquoteright}s} {Conditions} by {Means} of {Cover-Preserving} and {Partially} {Cover-Preserving} {Sublattices}},
     journal = {Bulletin of the Section of Logic},
     publisher = {mathdoc},
     volume = {45},
     number = {3-4},
     year = {2016},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/BSL_2016_45_3-4_a0/}
}