Luo Y, Zhang B, Whent M, Yu LL, Wang Q. Preparation and characterization of zein/chitosan complex for encapsulation of α-tocopherol, and its in vitro controlled release study. Colloids Surf B Biointerfaces. 2011 Jul 01;85(2):145–52. doi: 10.1016/j.colsurfb.2011.02.020. PMID: 21440424.