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Others can go directly to the site of this resource (access may be restricted) http://www.sciencedirect.com/science/article/pii/S0899900700004640?_rdoc=1&_fmt=high&_origin=gateway&_docanchor=&md5=b8429449ccfc9c30159a5f9aeaa92ffb
Others can go directly to the site of this resource (access may be restricted) http://www.sciencedirect.com/science/article/pii/S0899900700004640?_rdoc=1&_fmt=high&_origin=gateway&_docanchor=&md5=b8429449ccfc9c30159a5f9aeaa92ffb