DOI lookup trouble

I get a "Lookup Failed" message when I search for any DOI using the magic want DOI lookup.

I've tried this with several articles and the result is always the same. I've made sure that I'm pasting the whole DOI into the field, so I'm assuming it's not a problem on my end. Is this a problem with CrossRef? Can it be fixed?
  • I'd like to put togheter an issue I've been tryed to understand: Why cannot I add a lot of Brazilians book by their ISBN...

    For example:
    978-85-249-1579-6 (Epistemologias do Sul, 2010)
    978-85-260-1397-1 (O banquete dos Deuses, 2009)

    can someone help me to understand it?

    thanks
  • thiagodacuica: this is a different issue. open a new thread if you have more questions, but it is because those aren't in the woldcat database.
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