Digital Object Identifier. It's a permanent URL to avoid link rot, really useful for scientific articles. https://library.uic.edu/help/article/1966/what-is-a-d

Digital Object Identifier. It's a permanent URL to avoid link rot, really useful for scientific articles. https://library.uic.edu/help/article/1966/what-is-a-doi-and-how-do-i-use-them-in-citations https://library.uic.edu/help/article/1966/what-is-a-doi-and-...