5Sankar R, Archunan G. Identification of putative pheromones in bovine (Bos taurus) faeces in relation to estrus de- tectionJJ.Anita Reprod Sci. 2008, 103(12):149-153.
6Nardone A, N Lacetera, Bemabueci U, etal. Composi- tion of colostrum from dairy heifers exposed to high air tempera- tures during late pregnancy and the early postpartum period [J].J Dairy Sci, 1997, 80: 838-844.
7Johnson H D, Ragsdale A C, Berry I L, et al. Tempera- ture-humidity effects including influence of acclimation in feed and water consumption of Holstein cattle[J]. Univ of Missouri Res Bu11,1963, No. 846.