To cite the service as such, we suggest the following BibTeX entry:
@MISC{vo:GCP_TAP, year=2009, title={{PVOL} {EPN}-{TAP} {TAP} service}, author={Planetary Sciences Group, {UPV}/{EHU}}, url={http://pvol2.ehu.eus:8083/__system__/tap/run/info}, howpublished={{VO} resource provided by the {PVOL} {EPN}-{TAP}} }