@article{53964,
  author       = {{Tavana, Madjid and Izadikhah, Mohammad and Toloo, Mehdi and Roostaee, Razieh}},
  issn         = {{0305-0483}},
  journal      = {{Omega}},
  publisher    = {{Elsevier BV}},
  title        = {{{A new non-radial directional distance model for data envelopment analysis problems with negative and flexible measures}}},
  doi          = {{10.1016/j.omega.2020.102355}},
  volume       = {{102}},
  year         = {{2021}},
}