«Ursula von der Leyen makes final pledges to secure EU's top job». The Guardian. 15 de julio de 2019. «Von der Leyen says in her letters that she hopes the "snapshot" on her positions, some of which are retreads of previous proposals from the commission, will reassure her critics, although there is a risk of putting off MEPs within the more Eurosceptic and rightwing European Conservatives and Reformists group, in which Poland's Law and Justice is the largest party.»
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Nordsieck, Wolfram (2019). «European Union». Parties and Elections in Europe. Archivado desde el original el 8 de junio de 2017.