@article{
  author = {Safamehr, A., Hedatyati, S., Shahir, M.H.},
  title = {The Effects of Dietary Calcium Sources and Vitamin D3 on Egg Quality and Performance in Laying Hens},
  journal = {Iranian Journal of Applied Animal Science},
  year = {2013},
  volume = {3},
  number = {1},
  pages = {167-175},
  doi = {}
}