Didn't Beldjilali, Bouziane and Baghdad Atmani not co-author a paper?
Was a paper not not co-authored by Beldjilali, Bouziane and Baghdad Atmani?
ASK { ?x <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/97/2516> . ?x <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/36/1682> }
<https://dblp.org/pid/97/2516> <https://dblp.org/pid/36/1682>