To cite the service as such, we suggest the following BibTeX entry:
@MISC{vo:eiuomgatteta, year=2008, title={Access statistics for the {GAVO} data centre.}, author={{GAVO} Data Center}, url={http://dc.zah.uni-heidelberg.de/logs/logs/stats/info}, howpublished={{VO} resource provided by the {GAVO} Data Center} }