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    <subfield code="a">Artigo de divulga&#xE7;&#xE3;o sobre a moeda virtual "Bitcoin". Esta tem sido utilizada para diversos crimes via internet e a sua popularidade devida &#xE0; garantia de anonimato dada aos seus utilizadores. Contudo, as formas de combate aos crimes que utilizam moeda virtual t&#xEA;m vindo a tornar-se cada vez mais eficazes, como s&#xE3;o exemplo diversos casos recentes em que esse anonimato foi quebrado.</subfield>
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