@article{
  author = {Khodaverdizadeh, Mohammad, Hayati, Babollah, Raheli, Hossein, Kavoosi Kalashami, Mohammad},
  title = {Estimating the Recreational Value and Determining Effective Parameters on Willingness to Pay of Saint Stephanus Church
Visitors by applying Two Stages Heckman Approach},
  journal = {Journal of Environmental Science and Technology},
  year = {2015},
  volume = {17},
  number = {2},
  pages = {105-116},
  doi = {}
}