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}
}