Muth MK, Zhen C, Taylor J, Cates S, Kosa K, Zorn D, Choiniere C. The value to consumers of health labeling statements on breakfast foods and cereals. Journal of food products marketing. 2013 Jul;19(4):279-98. doi: 10.1080/10454446.2013.724372
Fondell E, Balter O, Rothman KJ. Dietary intake and supplement use of vitamins C and E and upper respiratory tract infection. J Am Coll Nutr. 2011 Aug 1;30(4):248-58.