@article{CHK13,
  author    = {T. Chen and
               T. Han and
               M. Kwiatkowska},
  title     = {On the complexity of model checking interval-valued discrete
               time Markov chains},
  journal   = {Inf. Process. Lett.},
  volume    = {113},
  number    = {7},
  year      = {2013},
  pages     = {210-216},
  publisher = {Elsevier},
  ee        = {http://dx.doi.org/10.1016/j.ipl.2013.01.004},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}