@article{
  author = {چعب, عبدالنور , قرينه, محمد حسين},
  title = {The effect of various plant density on the competitiveness of corn with natural population of  weeds},
  journal = {research in crop science},
  year = {2015},
  volume = {7},
  number = {26},
  pages = {1-14},
  doi = {}
}