1- Atashi, H. M, Moradi shahr Babak, A. Moghimi esfand Abadi. 2007.Evaluation the trend of milk yield change indoring with used of mathematical functions in Iranian of Holstein. 38(1): 67-76. IJASR.(In persion)
2- Ezadkhah, R. H., F. Arhangfar, M. Fathi Nasri and H. Naeimi por younes. 2011.Using a willaing function in genotypic analysis 305 days production traits and persistency Holstein dairy cows in khorasan razavi.3(3): 297-303..(In persion)
3- Bakhtiarzade, M., M. Moradi shahr Babak. 2010. Estimeated curve lactation parameters using an incomplete gamma function and nomination udder triat their genetic relationships with in Iranian of Holstein cows .41(1)1-10..(In persion)
4- Atashi, H. 2003. Determination of the best lactation curve function in Iranian ofHolstein dairycattle.M.Sc. thesis. Fac. Agric. Tehran Univ., Iran.
5- Araujo, C., R. F. Euclydes, C. N. Costa, R. D. Torres, P. S. Lopes, and C. S. Pereira. 2007. Genetic evaluation for persistency of lactation in Holstein cows using a random regression model. Genetic and Molecular Biology.65:349-355.
6- Bar-Anan, R., and M. Ron. 1985. Association among milk yield, yield persistency, conception, and culling of Israeli Holstein dairy cattle. J. Dairy Sci. 68:382–386.
7- Boostan, A. 2005.Comparsion of lactation curve functions and lactation persistency criteria with daily milk records. M. Sc. thesis. Fac. Agric. Tehran Univ., Iran.
8- Cupps, P., H. H. Cole and W. H. Freeman. 1966. Breeds of dairy cattle. in: Introduction to Livestock Prod.2nd Edition. San Francisco.
9- Castillo-Juarez, H., P. O. Oltenacu, R. W. Blake, C. E. Mcculloch, and E. G. Cienfuegos- Rivas. 2000. Effect of herd environment on the genetic and phenotypic relationships among milk yield, conception rate and somatic cell score in Holstein cattle. J. Dairy Sci. 83:807-819.
10- Dekkers, J. C. M., J. H. Ten Haag, and A. Weersink. 1998. Economic aspects of persistency of lactation in dairy cattle. Livest. Prod. Sci. 53:237–252.
11- Dematawewa, C. M. B. and P. J. Berger. 1998. Genetic and phenotypic parameters for305-day yield, fertility and survival in Holsteins. J. Dairy Sci. 81:2700–2709.
12- DeVries, A. 2006. Economic value of pregnancy in dairy cattle. J. Dairy Sci. 89:3876-3885.
13- Farhangfar, H. P. and P.Rowlinson.2007.Genetic analysis of woods lactation curve for Iranian Holestein heifers. Journal of Biological Science. 7: 127-135.
14- Gengler, N .1995 .Use of mixed models to appreciate the persistency of yield duringthe lactation of milk cows. Ph. D. Thesis. Faculteuniversitaire de SciencesAgronomiques de Gembloux, Gembloux, Belgium, 231pp.
15- Gengler, N .1996 .Persistency of lactation yields review .proc. international workshop on genetic improvement of functional traits in cattle. gembloux, Belgium.Interbull bulletin. No 12. Uppsala, Sweden. pp. 87-96.
16- Gengler, N., A. Tijani, G. R. Wiggans, J. C. Philpot. 2001. Indirect estimation of covariance functions for test-day yields production traits. during first and second lactations in the United States. J. Dairy Sci. 84, Available: http: / /www.adsa.org.
17- Haile-Mariam, M., P. J. Bowman and M. E. Goddard. 2003. Genetic and environmental relationships among calving interval, survival, persistency of milkyield and somatic cell count in dairy cattle. Livest. Prod. Sci. 80:189–200.
18- Jakobsen, J. H., P. Madsen, J. Jensen, J. Pedersen, L. G. Christensen, and D. A. Sorensen. 2002. Genetic parameters for milk production and persistency for Danish Holsteins estimated in random regression models using REML. J. Dairy Sci. 85:1607–1616
19- Khorshidie, R., A. A. Shadparvar, N. Ghavi Hossein-Zadeh, and S. Joezy Shakalgurabi. 2012. Genatic trends for 305-day milk yield and persistencyin Iranian Holsteins. Livest. prod. Sci. 144: 211-217.
20- Leon Velarde, C. U., I. McMilan, R. D. Gentry and J. W. Wilton. 1995. Models for estimating typical lactation curves in dairy cattle. J. Anim. Breed. Genet.112:333-340.
21- Madsen, O. 1975.A Comparison of some suggested measures of persistency of milk yield in dairy cows. Anim. Prod. 20:191-197.
22- Mahadevan, P. 1951. The effect of environment and heredity on lactation.II.Persistency of lactation. J. Agric. Sci. 41:89–93.
23- Meyer, K., and M. Kirkpatrick. 2005. Quantitative genetics of curvaceous traits. Phil. Trans. R. Soc. B. 360:1443-1455.
24- Muir, B. L., J. Fatehi and L. R. Schaeffer. 2004. Genetic Relationships betweenpersistency and reproductive performance in first-lactation Canadian Holsteins. J.Dairy Sci. 87:3029–3037.
25- Papajacsik, I. A., and J. Bodero. 1988. Modeling lactation curve of Friesian cows in asubtropical climate. Anim. Prod. 47:201-207.
26- Sherchand, L. R.,W. McNew, D. W. Kellogg, and Z. B. Johnson. 1995. Selection of a mathematical model to generate lactation curves using daily milk yields of Holstein cows. J. Dairy Sci. 78:2507-2513.
27- Slama, H., M. E. Wells, G. D. Adams, and R. D. Morrison.1976. Factors affecting calving interval in dairy herds. J. Dairy Sci. 59:1334-1339.
28- Swalve, H. H. and N. Gengler, 1999.Genetics of lactation persistency. Pages 75–82 in Metabolic Stress in Dairy Cows. J. D. Oldham, G. Simm, A. F. Groen, B. L. Nielsen, J. E. Pryce, and T. L. J. Lawrence, ed. BSAS occasional publication 24. Br. Soc. Anim. Sci. Penicuik, UK.
29- Turner, C. W. 1925.A quantitative form of expressing persistency of milk or fatsecretion. J. Dairy Sci. 9:203-214
30- Tekerli, M., Z. Akinci, I. Dogan and A. Akcan. 2000. Factors affecting the shape oflactation curves of Holstein cows from the balikesir Province of Turkey. J. Dairy Sci. 83:1381-1386.
31- Togashi, K., and C. Y. Lint. 2009. Economic weights for genetic improvement of lactation persistency and milk yield.J. Dairy Sci. 92:2915–2921.
32- Wood, P.D.P. 1967: Algebraic model of the lactation curve in cattle. Nature 216: 164-165.
33- Weller, J. I., and E. Ezra. 2004. Genetic analysis of the Israeli Holstein dairy cattle population for production and nonproduction traits with a multitrait animal model. J. Dairy Sci. 87:1519-1527.