Was a paper not not co-authored by Lang, W. and Javier Palafox-Albarr\u00E1n?
Didn't Lang, W. and Javier Palafox-Albarr\u00E1n not co-author a paper?
ASK { ?x <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/39/6717> . ?x <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/07/8924> }
<https://dblp.org/pid/39/6717> <https://dblp.org/pid/07/8924>