Most journals require that the authors sign an agreement in which the publisher retains the copyright of the paper (e.g. [1]).<p>Although a few publishers allow the authors to provide a pdf of the paper in their personal home-page, they do allow it to be uploaded to an open access platform.<p>[1] <a href="https:&#x2F;&#x2F;www.elsevier.com&#x2F;about&#x2F;company-information&#x2F;policies&#x2F;copyright" rel="nofollow">https:&#x2F;&#x2F;www.elsevier.com&#x2F;about&#x2F;company-information&#x2F;policies&#x2F;...</a>