Tahmasbi A, Kashefi E, Moghadam G, Taghizadeh A, Ghasemi H. Influence of β-Adrenergic Agonist (Metaproterenol) and Lysine on Growth, Carcass Quality in Broiler Chickens. Int. J. Poult. Sci. 2006;5(11):1082–1086. doi:10.3923/ijps.2006.1082.1086