Koohpar, H.K., Sayyahzadeh, H. and Pirsaraei, Z.A. (2010) “Comparing the Natural Mating with Artificial Insemination (A.I) at Mazandran Native Hen”, International Journal of Poultry Science, 9(7), pp. 711–715. doi:10.3923/ijps.2010.711.715.