[1] NIKKHAH A., "POSTPRANDIAL AND 24-H RHYTHMS OF PERIPHERAL UREA IN EVENING AND MORNING FED LACTATING COWS ON HIGH AND LOW CONCENTRATE DIETS," Veterinary Science Research, vol. 2, no. 1, pp. 13-16, . [Online]. Available: http://bioinfopublication.org/pages/article.php?id=BIA0001159