To cite the service as such, we suggest the following BibTeX entry:
@MISC{vo:_cs_srv, year=2007, title={Published Services}, author={Patrick Guio}, url={http://astroweb.projects.phys.ucl.ac.uk:8000/__system__/services/overview/info}, howpublished={{VO} resource provided by the {UCL} {DaCHS} server} }