An ISSN is an 8-digit code used to identify newspapers, journals, magazines and periodicals of all kinds and on all media–print and electronic. The ISSN role is to identify a publication. It is a digital code without any intrinsic meaning: it does not include any information about the origin or contents of the publication, it does not guarantee the quality or validity of the contents. The ISSN is associated with the title of the publication. If the publication is modified significantly, a new ISSN must be assigned. Please, don't forget send us the ISSN number of your publication AND ISSUE NUMBER, to generate the graphic files from it.