Olmstead, William N.; Bordwell, Frederick G. (1980). “Ion-pair association constants in dimethyl sulfoxide”. The Journal of Organic Chemistry45 (16): 3299–3305. doi:10.1021/jo01304a033.
Donna McCann et al "Food additives and hyperactive behaviour in 3-year-old and 8/9-year-old children in the community: a randomised, double-blinded, placebo-controlled trial" Lancet, 370(9598), 2007 Nov 3, pp1560-7. PMID17825405
Schab DW, Trinh NH, "Do artificial food colors promote hyperactivity in children with hyperactive syndromes? A meta-analysis of double-blind placebo-controlled trials"] Journal of developmental and behavioral pediatrics 25 (6), 2004 Dec, pp423-34. PMID15613992
Benzoic acid in Linstrom, P.J.; Mallard, W.G. (eds.) NIST Chemistry WebBook, NIST Standard Reference Database Number 69. National Institute of Standards and Technology, Gaithersburg MD. http://webbook.nist.gov (retrieved 2014-05-23)