To cite the service as such, we suggest the following BibTeX entry:
@MISC{vo:GloTS_servers_list, year=2010, title={Global {TAP} Servers List}, author={{GAVO} Data Centre}, url={http://dc.zah.uni-heidelberg.de/glots/q/servers/info}, howpublished={{VO} resource provided by the {GAVO} Data Center} }