The NASA Astrophysics Data System (ADS) provides a gateway to the online literature on Astronomy and Physics, which is maintained at the Harvard-Smithsonian Astrophysical Observatory (SAO) on behalf of NASA. Many of the papers in the data system are available electronically, either as scanned images, or links to the publishers' sites of electronic journals. Aside from literature searches, the database can be queried for bibliometry and analytics.
In the Electronic Journals Library (EZB) you will find journals licensed for the University of Hamburg as well as scientific and academic full text journals for free access via internet.
Licensed online publications are accessible via computers within the Universität Hamburg (IP-Range 134.100.*.*)
You can either use VPN-Dienst der Universität Hamburg (UHH) or a valid library-card is required.