On International Standard Serial Number (ISSN)
Royal Danish Library assigns ISSN numbers to periodicals, such as journals, newsletters, newspapers and yearbooks in both printed and electronic form.
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For professionals
ISSN (International Standard Serial Number) is an international numbering system used to identify publications that are published on a regular basis, e.g. newspapers, magazines, journals, blogs, etc., both printed and electronic. These publications are referred to as periodicals.

Royal Danish Library provides ISSN numbers for periodicals. You can contact us for an assignment of ISSN to your journal. On this page you will find the application form and practical information about ISSN.