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With great pleasure, we announce that all articles published in GRADUS have received a DOI number. For now, the DOI numbers are mentioned on the pages of each one of the articles. These DOI numbers will soon be added to the pdf files of each one of the published articles.
We take the opportunity to inform that, due to the difficulties imposed by the Covid-19 pandemic, the submission deadline for issue 6, number 1, has been extended to March 12, 2021.