Resende, Vanessa Cristina, et al. “Effects of Enzyme Supplementation on Diets of Medium-Heavy Laying Hens at 28 to 40 Weeks”. Revista Ciência Agronômica, vol. 48, nº 4, junho de 2017, https://periodicos.ufc.br/revistacienciaagronomica/article/view/84741.