To cite the service as such, we suggest the following BibTeX entry:
@MISC{vo:ADQL_tables, year=2008, title={{GAVO} Data Center Public Tables}, author={{GAVO} Data Centre}, url={https://dc.zah.uni-heidelberg.de/__system__/dc_tables/list/info}, howpublished={{VO} resource provided by the {GAVO} Data Center} }