Leznoff, Clifford C.Hayward, Roger J.2010-12-202010-12-201970Can. J. Chem., 1970, 48 1842-1849.http://hdl.handle.net/10315/6386enPhotocyclization Reactions Aryl Polyenes. The Photocyclization of 1-Substituted Phenyl-4-phenyl-1,3-butadienesArticlehttp://article.pubs.nrc-cnrc.gc.ca/ppv/RPViewDoc?issn=1480-3291&volume=48&issue=12&startPage=1842