This service has an associated publication. If you use its data, it may be appropriate to reference 2012A&A...544A..62S (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:mlqso_slit_web, year=2012, title={Slit spectra of lensed {QSOs}}, author={Sluse, D.}, url={https://dc.zah.uni-heidelberg.de/mlqso/q/webcube/info}, howpublished={{VO} resource provided by the {GAVO} Data Center} }
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