Was a paper not not co-authored by Zhi Quan and W. J. Kaiser?
Didn't Zhi Q. and W. J. Kaiser not co-author a paper?
ASK { ?x <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/47/5185> . ?x <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/99/4794> }
<https://dblp.org/pid/47/5185> <https://dblp.org/pid/99/4794>