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http://www.sciencedirect.com/science?_ob=MImg&_imagekey=B6T56-4YHP038-2-3&_cdi=4994&_user=38661&_pii=S0009279710001092&_origin=search&_coverDate=09%2F06%2F2010&_sk=998129998&view=c&wchp=dGLzVzb-zSkzS&md5=9c042a104b71eadf28fdf7298a0bfb79&ie=/sdarticle.pdf (Publisher version)
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