@article{
  author = {},
  title = {Study of grain yield of sunflower (Helianthus annuus L.) and corn (Zea mays L.) in different ratios of intercropping},
  journal = {research in crop science},
  year = {2013},
  volume = {2},
  number = {8},
  pages = {56-66},
  doi = {}
}