1- رامین، ع.ق.، آقازاده ع، کرمیان ت. (1386) ارزیابی بین ارتباط اوره و لاکتوز شیر اوره و گلوکز خون و میزان پروتئین و انرژی جیره در میش های شیروار. مجله دامپزشکی ایران، دوره 3، ص 33-24.##
2- رامین، ع.ق.، رضوی روحانی م.، بوداغی، ک، (1387) بررسی مقایسهای غلظت ماهانه اوره در شیر بز و میش در یک دورهی شیردهی. مجله دامپزشکی ایران. دوره 4، ص 107-102.##
3- Arunvipas, P.; Vanleeuwen, J.A.; Dohoo, I.R.; Leger, E.R.; Keefe, G.P.; Burton, A.S. and Lissemore, K.D. (2007) Milk urea-nitrogen negatively affected first service breeding success in commercial dairy cows in Prince Edward Island, Canadian. Prevent.Vet. Med.; 82: 42-50.##
4- Bed, S.; Nikodemusz, E.; Gunndel, K. and Nagy, Z. (1997) Relation of plasma concentration of urea, glucose and total protein to milk levels of urea, lactose and protein of grazing ewes during lactation. In: Arch. Tierz. Dummerstorf; 40: 265-275.##
5- Burgos, S.A.; Fadel, J.G. and Depeters, E.J. (2007) Prediction of ammonia from dairy cattle manure based on milk urea nitrogen: relation of milk urea nitrogen to urine urea nitrogen excretion. J. Dairy Sci.; 90: 5499-5508.##
6- Cannas, A.; Pes, A.; Mancuso, R.; Vodret, B. and Nudda, A. (1998) Effect of dietary energy and protein concentration on the concentration of milk urea nitrogen in dairy ewes. J. Dairy Sci; 81: 499-508.##
7-Casamassima, D.; Sevi, A.; Patazzo, M.; Ramacciato, R.; Colella, G.E. and Bellitti, A. (2001) Effects of two different housing systems on behavior, physiology and milk yield of comisana ewes. Dipartimento di. Scienze Animali.; 41: 151-161.##
8- Eicher, R. (1999) Factors affecting milk urea nitrogen and protein concentrations in Quebec dairy cows. Prevent. Vet. Med; 39: 53-63. ##
9- Fekadu, B.; Soryal, K.; Van Hekken, D.; Bah, B.; Villaquiran, M. (2005) Changes in goat milk composition during lactation and their effect on yield and quality of hard and semi-hard cheeses. Small Ruminant Res.; 59: 55-63. ##
10- Fraser, M.D. and Moorby, J.M. (1998) Plasma biochemical values in the guanaco (lama guanicoe) and a comparison with the sheep; Animal Sci., 66: 206-216.##
11- Gfrorer, F. and Koch, G. (1985) Determination of the urea content of milk in general practice. Tieraztl prax.; 13:559-563.##
12- Igbokwe, I.O. (1993) Haemoconcentration in yankasa sheep exposed to prolonged water deprivation. Small Ruminant Res., 12: 99-105.##
13- Jonker, J.S.; Kohn, R.A. and High, J. (2002) Use of milk urea nitrogen to improve dairy cow diets. J. Dairy Sci., 85: 4939-4946.##
14- Kecec, T. (2003) Effect of low Birthweight on serum thyroid hormones, glucose, urea and blood pH in newborne lambs. Turkish J, Vet. Anim. Sci.; 27:395-399.##
15- Khaled, N.F.; Illek, J. and Gajdusek, S. (1999) Interactions between nutrition, blood metabolic profile and milk composition in dairy goats; Acta Veterinaria, 68: 253-258.##
16- Nbibualonji, B.B.; Rodrigues, M.N.; Dehareng,. D. and Godeau, J.M. (1998) Effects of late pregnancy and early lactation on renal urea handling in corriedale ewes. J. Agri. Sci., 130:213-216.##
17- Naylor, J.M. and Ralston, S.L. (1991) Large Animal Clinical Nutrition. Mosby Year Book, Inc., Missouri, USA, pp: 6-21.##
18- Park, Y.K.; Koo, H.C.; Kim, S.H.; Hwang, S.Y.; Jung, W.K.; Kim, J.M.; Shin, S.; Kim, R.T. and Park, Y.H. (2007) The analysis of milk components and pathogenic bacteria isolated from bovine raw milk in Korea. J. Dairy Sci.; 90: 5404-5414.##
19- Rashida, K; Tooqeer, A.; Bshra, M. (2004) Comparative analysis of quality of milk collected from buffalo, cow, goat and sheep of Rawalpindi/Islamabad region in Pakistan. Asian J. Plants Sci., 3: 300-305. ##
20- Ropstad, E.; Vik-Mo, L. and Refsdal, A.O. (1989) Levels of milk urea, plasma constituents and rumen liquid ammonia in relation to the feeding of dairy cows during early lactation. Acta Vet. Scand.; 30:199-208.##
21- Skrzypek, R; Chraplewski, H. and Biaon, K, (2005) Relationship between milk urea concentration and cow fertility. Medycyna Weterynaryjna, 61: 536-539.##
22- Tadich, N.; Wittwer, F.; Gallo, C. and Jorquera, M. (1994) Effecto de un programa de salud en ovinus sobre la condition corporal y los valores sanquines de-B-hidroxibutirato, hematocrite Y urea, In: Arch Medicina, 26: 43-50, Abstract.##
23- Trevaskis, L.M. and Fulkerson, W.J. (1999) The relationship between various animal and management factors and milk urea and its association with reproductive performance of dairy cows grazing pasture. Live. prod. Sci., 57: 255-265.##
24- Wittwer, F.G.; Gallardo, P.; Reyes, J.; Opitz, H. (1999) Bulk milk urea concentrations and their relationship with cow fertility in grazing dairy herds in southern Chile. Prev. Vet. Med.; 38: 159-166.##