What is the Krasnikov Metric for Wormholes and How Does It Create Exotic Matter?

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On 12.April 2000, BBC news http://news.bbc.co.uk/2/hi/science/nature/710812.stm, quoting an article in New Scientist (to which I don’t have access, and which is anyway usually sketchy on details), wrote that Sergei Krasnikov of the Pulkovo Observatory in St. Petersburg has found a way (presumably a metric by which a specific kind of “wormhole can create its own abundant supply of exotic matter” to stay open. I found “Toward a traversable wormhole” by Krasnikov at www.zamandayolculuk.com/cetinbal/pdfdosya/wh.pdf , but it is undated, so that except for the references telling me it is after 1999, I cannot tell if this latter article was written before or after the one to which New Scientist is referring. From the contents, I would guess before. Can anyone give me a link (preferably freely accessible, without having to sign up for anything) to an article with more details of this type of theoretical wormhole which Krasnikov has worked out, or is the pdf article cited above all that, with journalistic hyperbole, New Scientist is referring?
 
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