WALDROUP, P.W.; FRITTS, C.A. Evaluation of Separate and Combined Effects of Choline and Betaine in Diets for Male Broilers. International Journal of Poultry Science, Pakistan, v. 4, n. 7, p. 442–448, 2005. DOI: 10.3923/ijps.2005.442.448. Disponível em: https://ijpsjournal.org/index.php/ijps/article/view/362. Acesso em: 22 sep. 2025.