@article{DBLP:journals/ipl/XiangUT00,
  author    = {Limin Xiang and
               Kazuo Ushijima and
               Changjie Tang},
  title     = {Efficient loopless generation of Gray codes for k-ary trees},
  journal   = {Inf. Process. Lett.},
  volume    = {76},
  number    = {4-6},
  year      = {2000},
  pages     = {169-174},
  ee        = {http://dx.doi.org/10.1016/S0020-0190(00)00139-3},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}