Noguera S E G, Vale W G, Ribeiro H F L, Rolim Filho S T, Reis A N, Sousa J S and Silva A O A 2013: Fixed-time artificial insemination in cows and buffaloes using an intravaginal releasing progesterone insert. Livestock Research for Rural Development. Volume 25, Article #171. Retrieved , from http://www.lrrd.org/lrrd25/10/nogu25171.htm