This service has an associated publication. If you use its data, it may be appropriate to reference 1963ASPL....9...89L (ADS BibTeX entry for the publication) either in addition to or instead of the service reference.
To cite the service as such, we suggest the following BibTeX entry:
@MISC{vo:Kayteyn_Web, year=2012, title={Potsdam Kapteyn Plates Web Service}, author={Tsvetkov, M and Tsvetkova, K. and Demleitner, M.}, url={https://dc.zah.uni-heidelberg.de/kapteyn/q/web/info}, howpublished={{VO} resource provided by the {GAVO} Data Center} }
Some services have additional advice or requests on citing in their copyright information. For this service, that is: