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.