(1)
Attia, Y.; Hassan, R.; Shehatta, M.; El-Hady, S. B. A. Growth, Carcass Quality and Serum Constituents of Slow Growing Chicks As Affected by Betaine Addition to Diets Containing 2. Different Levels of Methionine. Int. J. Poult. Sci. 2005, 4 (11), 856–865. https://doi.org/10.3923/ijps.2005.856.865.