BlokhuisL84'

@article{DBLP:journals/jct/BlokhuisL84,
  author    = {Aart Blokhuis and
               Clement W. H. Lam},
  title     = {More Coverings by Rook Domains},
  journal   = {J. Comb. Theory, Ser. A},
  volume    = {36},
  number    = {2},
  year      = {1984},
  pages     = {240-244},
  ee        = {http://dx.doi.org/10.1016/0097-3165(84)90010-4},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}