@article{
  author = {Golipour, Hosein, mirshekari, bahram, hoseynzadehmogbli, amirhoshang, hanifiyan, shahram},
  title = {Critical period of weeds control in sunflower, Helianthus annus L.},
  journal = {Agroecology Journal},
  year = {2010},
  volume = {5},
  number = {4},
  pages = {76-82},
  doi = {}
}