Didn't Shahbaz, Muhammad and Maria Zafar not co-author a paper?
Was a paper not not co-authored by Muhammad Shahbaz and Maria Zafar?
ASK { ?x <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/73/6941-3> . ?x <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/265/3209> }
<https://dblp.org/pid/73/6941-3> <https://dblp.org/pid/265/3209>