van Opijnen, Marc (2008). "Finding Case Law on a European Scale – Current Practice and Future Work". Legal Knowledge and Information Systems – JURIX 2008: The Twenty-First Annual Conference. IOS Press: 43–52. SSRN2046266.
van Opijnen, Marc (2011). Biasiotti, M.A.; Faro, S. (eds.). "European Case Law Identifier: indispensable asset for legal information retrieval". From Information to Knowledge. Online Access to Legal Information: Methodologies, Trends and Perspectives. IOS Press: 91–104. SSRN2046160.
van Opijnen, Marc; Ivantchev, Alexander (2015). "Implementation of ECLI - State of Play". Legal Knowledge and Information Systems – JURIX 2015: The Twenty-Eighth Annual Conference. IOS Press. SSRN2706768.