↑ Witten, Ian H., David Bainbridge and David M. Nichols (2010). How to Build a Digital Library (edisi 2nd). Amsterdam; Boston: Morgan Kaufmann. m/s. 352–253. ISBN978-0-12-374857-7. Selenggaraan CS1: Pelbagai nama: senarai pengarang (link)
↑ Langston, Marc; Tyler, James (2004). "Linking to journal articles in an online teaching environment: The persistent link, DOI, and OpenURL". The Internet and Higher Education. 7 (1): 51–58. doi:10.1016/j.iheduc.2003.11.004.
↑ "How the 'Digital Object Identifier' works". BusinessWeek. BusinessWeek. 2001-07-23. Dicapai 2010-04-20. Assuming the publishers do their job of maintaining the databases, these centralized references, unlike current Web links, should never become outdated or broken.
↑ Davidson, Lloyd A.; Douglas, Kimberly (1998). "Digital Object Identifiers: Promise and problems for scholarly publishing". Journal of Electronic Publishing. 4 (2). doi:10.3998/3336451.0004.203. Parameter |month= tidak diketahui diabaikan (bantuan)
