@article{AbelShepelyansky2011,
  author    = {M. W. Abel and Dima L. Shepelyansky},
  title     = {Google matrix of business process management},
  journal   = {The European physical journal : B, Condensed matter and complex systems},
  volume    = {84},
  number    = {4},
  pages     = {493 -- 500},
  doi       = {10.1140/epjb/e2010-10710-y},
  year      = {2011},
}