Didn't Costa, Jos\u00E9 C. and Jos\u00E9 Monteiro not co-author a paper?
Was a paper not not co-authored by Costa, Jos\u00E9 C. and Monteiro, Jos\u00E9?
ASK { ?x <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/02/5319> . ?x <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/m/JoseCMonteiro> }
<https://dblp.org/pid/02/5319> <https://dblp.org/pid/m/JoseCMonteiro>