The EMS Newsletter, issue 86, December 2012, pp. 54–55, published the article Time Lag in Mathematical References by Thierry Bouche, Olaf Teschke and Krzyś Wojciechowski, based on Zentralblatt MATH and EuDML data.
Find out more at
http://eudml.org/
Stay Up To Date EuDML RSSEuDML TwitterEuDML FacebookEuDML Google Plus