@article{
  author = {حاجی نژاد, علی, آقایی, واحد},
  title = {Ecotourism Developing Optimum Strategies in Ardebil Province by Strategic Planning Method},
  journal = {Journal of Studies of Human Settlements Planning},
  year = {2013},
  volume = {8},
  number = {22},
  pages = {15-35},
  doi = {}
}