@article{DBLP:journals/ijar/ChenKZ05,
  author    = {Tao Chen and
               Tom{\'a}s Kocka and
               Nevin Lianwen Zhang},
  title     = {Effective dimensions of partially observed polytrees},
  journal   = {Int. J. Approx. Reasoning},
  volume    = {38},
  number    = {3},
  year      = {2005},
  pages     = {311-332},
  ee        = {http://dx.doi.org/10.1016/j.ijar.2004.05.008},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}