Archbald, LF 1993. Dairy herd reproductive efficiency. In Current veterinary therapy 3, food animal practice (ed. Howard, JL), pp. 798-800. WB Saunders Company, Philadelphia, PA.
Arbel, R, Bigun, Y, Ezra, E, Sturman, H and 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.
Barth, AD 1993. Factors affecting fertility with artificial insemination. In Female bovine infertility (ed. Braun, WF and Youngquist, RS), Veterinary clinics of North America: food animal practice 9, 275-289.
Britt, JH 1985. Enhanced reproduction and its economic implications. Journal of Dairy Science 68, 1585-1592.
Cassell, BG, Jobst, SM, McGilliard, ML and Pearson, RE 2002. Evaluating sire selection practices using lifetime net income functions. Journal of Dairy Science 85, 3492-3502.
De Vries, A, Steenholdt, C and Risco, CA 2005. Pregnancy rates and milk production in natural service and artificially inseminated dairy herds in Florida and Georgia. Journal of Dairy Science 88, 948-956.
Ensminger, ME 1993. Dairy cattle science. Interstate Publishers Inc., Danville, IL.
Esslemont, RJ, Bailie, JH and Cooper, MJ 1985. Fertility management in dairy cattle. Collins, London, UK.
French, PD and Nebel, RL 2003a. 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.
González-Recio, O, Pérez-Cabal, MA and Alenda, R 2004. Economic value of female fertility and its relationship with profit in Spanish dairy cattle. Journal of Dairy Science 87, 3053-3061.
Hillers, JK, Thonney, SC and Gaskins, CT 1982. Economic comparison of breeding dairy cows artificially versus naturally. Journal of Dairy Science 65, 861-865.
Holmann, FJ, Shumway, CR, Blake, RW, Schwart, RB and Sudweeks, EM 1984. Economic value of days open for Holstein cows of alternative milk yields with varying calving intervals. Journal of Dairy Science 67, 636-643.
Johnston, RP, Sendelbach, AG and Howard, WT 1987. The annual cost of a dairy sire. University of Wisconsin Extension Publication, Madison, USA.
1989. Nutrient requirements of dairy cattle, sixth revised edition. National Academy Press, Washington, DC.
Niles, D and Risco, CA 2002. Seasonal evaluation of artificial insemination and natural service pregnancy rates in dairy herds. Compendium for the Continuing Education of Practicing Veterinarians 24, S44.
Norman, HD, Powell, RL, Wright, JR and Slatter, CG 2002. Timeliness and effectiveness of progeny testing through artificial insemination. Journal of Dairy Science 86, 1513-1525.
Overton, MW 2005. Cost comparison of natural service sires and artificial insemination for dairy cattle reproductive management. Theriogenology 64, 589-602.
Overton, MW and Sischo, WM 2005. Comparison of reproductive performance by artificial insemination versus natural service sires in California dairies. Theriogenology 64, 603-613.
Peters, AR and Ball, PJH 1995. Reproduction in cattle. Blackwell Science Ltd, Oxford, UK.
Plaizier, JCB, King, GJ, Dekkers, JCM and 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.
Risco, CA 2000. Management and economics of natural service sires on dairy herds. In Topics in bull fertility (ed. Chenoweth, PJ), International Veterinary Information Service, Ithaca NY (www.ivis.org).
Schmidt, GH 1989. Effect of length of calving intervals on income over feed and variable costs. Journal of Dairy Science 72, 1605-1611.
Shaw, C and Dobson, H 1996. Reproductive and financial impact of a do-it yourself artificial insemination program compared with keeping a bull. Veterinary Record 139, 594-597.
Smith, JW, Ely, LO, Gilson, WD and Graves, WM 2003. Effect of artificial insemination vs natural service breeding on production and reproduction parameters. Journal of Dairy Science 81, (Suppl. 1) 357.
Valergakis, GE 2000. Farm conditions and methods of dairy cattle production in relation to the dairy farming productivity and profitability. , Faculty of Veterinary Medicine, Aristotle University of Thessaloniki, Greece.
Valergakis, GE and Banos, G 2004. Investment plan for decreasing the cow milk production cost. Journal of the Hellenic Veterinary Medical Society 55, 11-20.
Valergakis, GE, Banos, G, Arsenos, G and Zioganas, C 2004. Comparative study of natural service and artificial insemination costs in dairy cattle. Proceedings of the fourth Panhellenic Congress of Food Animal Veterinary Medicine, Thessaloniki, Greece, pp. 179-180.
Vishwanah, R 2003. Artificial insemination: the state of the art. Theriogenology 59, 571-584.
Williams, CB, Oltenacu, PA, Bratton, CA and Milligan, RA 1987. Effect of business and dairy herd management practices on the variable cost of producing milk. Journal of Dairy Science 70, 1701-1709.
Williamson, NB, Morris, RS and Anderson, GA 1978. Pregnancy rates and nonreturn rates following artificial and natural breeding in dairy herds. Australian Veterinary Journal 54, 111-120.
Zwald, N 2003. Does the extra effort of A.I. pay off? Hoard's Dairyman Supplement, 25 October, p.11..