@article{
  author = {Rezaeei, M., Bazafshan, F., Ordokhani, K.},
  title = {The effect of planting density on yield and yield components of cowpea (Vigna unguiculata L.)},
  journal = {Journal of Plant Ecophysiology},
  year = {2012},
  volume = {4},
  number = {11},
  pages = {61-74},
  doi = {}
}