zbMATH, well-known under its former name Zentralblatt MATH, contains more than 3.3 million entries drawn from more than 3,000 current journals and serials and 170,000 books, with coverage across mathematics, statistics, computer sciences and the applications of these disciplines in engineering, physics, and the life sciences.
Reviews are currently written by more than 7,000 experts from all over the world, and around 120,000 new items were added in 2012. It covers the period from 1868 - in some cases from 1826 - to the present. For more information see: http://www.springer.com/gp/products/databases-and-software/zbmath