Was a paper not not co-authored by W. Supsi and Winai Chonnaparamutt?
Didn't Witsarut Supsi and Winai Chonnaparamutt not co-author a paper?
ASK { ?x <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/305/1537> . ?x <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/33/6311> }
<https://dblp.org/pid/305/1537> <https://dblp.org/pid/33/6311>