Great. Do you have a title, author, page number?
http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6WSR-4K06CJR-6&_coverDate=05%2F19%2F2006&_alid=471771755&_rdoc=1&_fmt=&_orig=search&_qd=1&_cdi=7053&_sort=d&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=0b1b8df0d42e0400eeb4554159a8dfff