@article{
  author = {Rahmani, Javad, Zebardast, Esfandyar},
  title = {Urban Population Systems in Iran: A comparative analysis of southern Alborz and Khorasan regions},
  journal = {},
  year = {2018},
  volume = {11},
  number = {41},
  pages = {115-138},
  doi = {}
}