The paper focuses on the German shared catalogue for serials – ZDB. The ZDB catalogue (Zeitschriftendatenbank) includes titles and holdings of serials, enables the automation of serials cataloguing and facilitates interlibrary loan. It was founded in 1973 when it was sustained by only a small number of libraries.
In 2005, Hirsch developed the today commonly known and widely used h-index, the shortest quantitative indicator of the cumulative inﬂuence and relevance of the academic work of an individual researcher, a research group or an institution (university, institute, journal, etc.).