Was a paper not not co-authored by Pierre Hansen and Aouchiche, Mustapha?
Didn't Pierre H. and Mustapha Aouchiche not co-author a paper?
ASK { ?x <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/h/PierreHansen> . ?x <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/64/5936> }
<https://dblp.org/pid/h/PierreHansen> <https://dblp.org/pid/64/5936>