This service has an associated publication. If you use its data, it may be appropriate to reference http://archive.eso.org/wdb/wdb/eso/sched_rep_arc/query?progid=097.C-0261(A) either in addition to or instead of the service reference.
To cite the service as such, we suggest the following BibTeX entry:
@MISC{vo:eistuhpumbla, year=2017, title={{K2C9} {VST} Time Series Browser Interface}, author={Hundertmark, M. and Korhonen, H. and Jørgensen, U. and Street, R and Penny, M. and Tsapras, Y. and Dominik, M. and Kerins, E. and Cassan, A. and Snodgrass, C. and Bachelet, E. and Bramich, D. and Bozza, V.}, url={http://dc.zah.uni-heidelberg.de/k2c9vst/q/web/info}, howpublished={{VO} resource provided by the {GAVO} Data Center} }