http://www.siam.org/
http://search.proquest.com/
http://link.springer.com/
http://www.computer.org/
http://infotrac.galegroup.com/
http://www.emeraldinsight.com/
http://search.ebscohost.com/
http://journals.cambridge.org
http://www.aps.org/
http://www.aip.org/
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