@article{DBLP:journals/jct/EthierMPST12,
  author    = {John T. Ethier and
               Gary L. Mullen and
               Daniel Panario and
               Brett Stevens and
               David Thomson},
  title     = {Sets of orthogonal hypercubes of class r},
  journal   = {J. Comb. Theory, Ser. A},
  volume    = {119},
  number    = {2},
  year      = {2012},
  pages     = {430-439},
  ee        = {http://dx.doi.org/10.1016/j.jcta.2011.10.001},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}