To cite the service as such, we suggest the following BibTeX entry:
@MISC{vo:harvtrig, year=2012, title={Harvest Trigger Service}, author={{PADC}}, url={http://voparis-rr.obspm.fr/rr/q/harvtrig/info}, howpublished={{VO} resource provided by the {PADC} {TAP} Server on voparis-rr.obspm.fr} }