Influence of abomasal infusion of the non-ionic surfactant Tween 80 on postruminal fatty acids digestion in steers fed a fat-supplemented, high-energy diet - RAMOS, H DÃVIL; GONZÃLEZ-VIZCARRA, V M; LOPEZ-VALENCIA, G; MONTAÃ‘O, M F; PLASCENCIA, A; VALDÉS, Y S; VEGA, M A; ZINN, R A (The Indian Journal of Animal Sciences, 2011)