To cite the service as such, we suggest the following BibTeX entry:
@MISC{vo:pubDID_resolver, year=2015, title={Global {PubDID} resolver}, author={Markus Demleitner}, url={https://dc.zah.uni-heidelberg.de/ivoidval/q/didresolve/info}, howpublished={{VO} resource provided by the {GAVO} Data Center} }