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コメント:(必須) Oswaldoさんは No.116603「sAShkgHQSnQXfeCArS」で書きました。 >How do you spell that? http://www.amassarandi.com.br/cheapes-tadacip-on-internet-ezbo tadacip sodbrennen > In academia at least, there’s a movement to using DOIs instead of direct links to maintain pointers to online published material. This prevents link rot (at least as long as the DOI servers themselves are maintained), but doesn’t necessarily guarantee access. In ye olde days of course, if a book went out of print or a magazine died, copies would continue to exist in libraries. >