@article{
  author = {Haddad, Shervin, safavi, Bijan, adabi, Hamidreza},
  title = {The effect of the black economy in the moral sense of security in cities},
  journal = {Urban Management Studies},
  year = {2017},
  volume = {8},
  number = {27},
  pages = {29-40},
  doi = {}
}