* [http://unimarc-it.wikidot.com/Collezioni Collezioni, supplementi, etc.], http://www.sba.unisi.it/almahelp/SBS01/423_xx_ita.html, Unimarc-IT (італ.)

* https://blog-electre.com/blog/unimarc-ouvertures-des-zones-423-et-464/

* https://www.issn.org/understanding-the-issn/assignment-rules/issn-manual/#15-2-other-edition-entry, https://www.issn.org/wp-content/uploads/2021/04/ISSNManual_rus_07.06.2017.pdf#%5B%7B%22num%22%3A416%2C%22gen%22%3A0%7D%2C%7B%22name%22%3A%22XYZ%22%7D%2C54%2C231%2C0%5D