Molnár, P., J. Deli, Ferenc Zsila, A. Steck, H. Pfander, and G. Tóth. (2004) 2004. “Preparation And (E/Z)-Isomerization Of The Diastereoisomers Of Violaxanthin”. Helvetica Chimica Acta 87: 11-27. http://www.scopus.com/inward/record.url?eid=2-s2.0-1342345092&partnerID=40&md5=39065547419a481a9f38576632d4b450.