- Arbel, R., Bigun,Y., Ezra, E., Sturman, H. & Hojman, D.(2001). The effect of extended calving intervals in high lactating cows on milk production and profitability. Journal of Dairy Science, 84, 600-608.
- Bellows, D.S., Ott, S.L. & Bellows, R.A. (2002). Cost of reproductive diseases and conditions in cattle. The Prof. Animal Science, 18, 26-32.
- Boichard, D. (1990). Estimation of the economic value of conception rate in dairy cattle. Livestock Production Science, 24, 187-204.
- De Vries, A. & Conlin, B.J. (2003). Economic value of timely determination of unexpected decreases in detection of estrus using control charts. Journal of Dairy Science, 86, 3516-3526.
- De Vries, A. (2006). Economic value of pregnancy in dairy cattle. Journal of Dairy Science 89:3876–3885.
- Dobson, H., Smith, R.F., Royal, M.D., Knight, C.H. & Sheldon, I.M. (2007). The High-producing dairy cow and its reproductive performance. Reproduction Domestic Animal, 42 (Suppl.2), 17-23.
- Dekkers, J.C.M., Ten Hag, J.H. &Weersink A. (1998). Economic aspects of persistency of lactation in dairy cattle. Livestock Production Science, 53, 237-252.
- Esslemont, R.J., Kossaibati, M.A. & Allock, J. (2000). Economics in fertility in dairy cows. Fertility in high producing dairy cows. Occasional publication No.26. British Society of Animal Science. PP. 19-28.
- French, P. D. & Nebel, R.L. (2003). The simulated economic cost of extended calving intervals in dairy herds and comparison of reproductive management programs. Journal of Dairy Science, 86 (Suppl. 1), 54 (abstract).
- Hare, E., Norman, H.D. & Wright, J.R. (2006). Trends in calving ages and calving intervals for dairy cattle breed in the United States. Journal of Dairy Science, 89, 365-370.
- Holmann, F. J., Shumway, C.R., Blake, R.W., Schwart, R.B. & Sudweeks, E.M. (1984). Economic value of days open for Holstein cows of alternative milk yields with varying calving intervals. Journal of Dairy Science, 67, 636-643.
- 12. Hutjens, M.F. (2005). Dairy efficiency and dry matter intake. Proceedings of the 7th Western Dairy Management Conference.
- Inchaisria, C., Jorritsma, R., Vos, P.L.A.M., van der Weijdena, G.C. & Hogeveen, H. (2010). Economic consequences of reproductive performance in dairy cattle. Theriogenology, 74, 835-846.
- Kafi, M., Zibaei, M. & Rahbari, A. (2007). Accuracy of estrous detection in cows and its economic impacts on Shiraz dairy farms. Iranian.Journal of Vetrinary Research, 8 (2), 131-137.
- Knight, C.H. (2001). Lactation and gestation in dairy cows: flexibility avoids nutritional extremes. Proceeding Nutrition Society, 60, 527-537.
- Linn, J. (2006). Feed efficiency: Its economic impact in lactating dairy cows. WCDS Advances in Dairy Technology, 18, 19-28.
- Meadows, C., Rajala-Schultz, P.J. & Frazer, G.S. (2005). A Spreadsheet-based model demonstrating the nonuniform economic effects of varying reproductive performance in Ohio dairy herds. Journal of Dairy Science, 88, 1244-1254.
- Moore, K. & Thatcher, W.W. (2006). Major advances associated with reproduction in dairy cattle. Journal of Dairy Science, 89, 1254-1266.
- Mulligan, F.J., O’Grady, L., Rice, D.A.&Doherty, M.L. (2006). A herd health approach to dairy cow nutrition and production diseases of the transition cow. Animal Reproduction Science, 96, 331-353.
- Pasman, E.J. (1994). The development of control prediction system for milk yield and mastitis from field data. Ph.D. Tesis. Department of Agriculture. The University of Reading, UK.
- Plaizier, J. C. B., King, G.J., Dekkers, J.C.M. & Lissemore, K. (1997). Estimation of economic values of indices for reproductive performance in dairy herds using computer simulation. Journal of Dairy Science, 80, 2775-2783.
- Pryce, J.E., Royal, M.D., Garnsworthy, P.C. & Mao, I.L. (2004). Fertility in the high-producing dairy cow. Livestock Production Science, 86, 125-135.
- Roche, J.F. (2006). The effect of nutritional management of the dairy cow on reproductive efficiency. Animal Reproduction Science, 96, 282-296.
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