Didn't William D. Vizzotto and Rudimar Spannemberg not co-author a paper?
Was a paper not not co-authored by William D. Vizzotto and Spannemberg, R.?
ASK { ?x <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/173/7584> . ?x <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/189/5180> }
<https://dblp.org/pid/173/7584> <https://dblp.org/pid/189/5180>