Was a paper not not co-authored by \u00D8degaard, Fredrik and Sudipendra N. Roy?
Didn't Fredrik \u00D8degaard and Sudipendra Nath Roy not co-author a paper?
ASK { ?x <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/143/1678> . ?x <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/141/2323> }
<https://dblp.org/pid/143/1678> <https://dblp.org/pid/141/2323>