«Implementing Persistent Identifiers: Overview of Concepts, Guidelines and Recommendations / Hans-Werner Hilse and Jochen Kothe». DigItalia 2, no. 1 (gennaio 22, 2007): 167–168. Consultato aprile 29, 2026. https://digitalia-ojs35-test.archicoop.it/index.php/digitalia/article/view/420.