Please see http://vlib.mpg.de/start?title=WoK for Web of Knowledge databases as available in vLib.
As a consequence of an unexpected change of web services (i.e. services required by vLib to search databases in the background, and present results), Web of Science databases (e.g. A&HCI, SCI, SSCI) are no longer searchable through a single resource – see Web of Science – hence no vLib search checkbox is available for Web of Science at the moment.
In addition, integration of remaining WoK databases (Biosis Previews, INSPEC, Zoological Record) has turned out to be problematic and error-prone (at least INSPEC search had to be switched off entirely, investigation is continuing).
Please drop us a comment if you appreciate a stable, cross-searchable interface to search WoK databases in vLib.
Thank you in advance,
The vLib project team