CookHRZ12'

@article{DBLP:journals/eor/CookHRZ12,
  author    = {Wade D. Cook and
               Julie Harrison and
               Paul Rouse and
               Joe Zhu},
  title     = {Relative efficiency measurement: The problem of a missing
               output in a subset of decision making units},
  journal   = {European Journal of Operational Research},
  volume    = {220},
  number    = {1},
  year      = {2012},
  pages     = {79-84},
  ee        = {http://dx.doi.org/10.1016/j.ejor.2012.01.022},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}