Was a paper not not co-authored by Victor Hazlewood and Barbara H.?
Didn't V. Hazlewood and Barbara H. not co-author a paper?
ASK { ?x <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/04/4418> . ?x <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/139/4902> }
<https://dblp.org/pid/04/4418> <https://dblp.org/pid/139/4902>