@article{
  author = {Taktaz Hafshejani,, T., Khadivi Boroujeni,, S., Babakhanian Boroujeni,, فرشاد},
  title = {Comparison of three types of GNRH administration in
heat synch program on pregnancy rate and LH surge
in dairy cows},
  journal = {journal of veterinary clinical research},
  year = {2013},
  volume = {4},
  number = {4},
  pages = {269-279},
  doi = {}
}