TY  - JOUR 
T1  - Bioavailability comparison of free and esterified lutein for layer hens
JO  - Brazilian Journal of Poultry Science
A1  - Wu, L
A1  - Huang, X
A1  - Shi, K
A1  - Tan, R
SN  - 1516-635X
UL  - 10.1590/S1516-635X2009000200004
VL  - 11 
Y1  - 2009
PB  - Brazil 
ER  -