Millions of research papers at risk of disappearing from the Internet

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[rajendra]

doiを付していても論文を追跡できない、ただし論文が消えたわけではなくアーカイブに辿り着けないだけ、程度の意味合いじゃないかしら。道筋をメンテナンスし続けるのはコストかかるよね。