@article{
  author = {Arast, مینا, Zehtabian, GH.R, Jafari, محمد, Khosravi, حسن, Shojaee, سعید},
  title = {Simulation of changes trend in soil chemical properties Irrigated with wastewater using Gene expression programming model},
  journal = {Natural Ecosystems of Iran},
  year = {2016},
  volume = {7},
  number = {2},
  pages = {23-34},
  doi = {}
}