Was a paper not not co-authored by Luigi Chisci and N. Forti?
Didn't Chisci, Luigi and N. Forti not co-author a paper?
ASK { ?x <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/68/5289> . ?x <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/152/4133> }
<https://dblp.org/pid/68/5289> <https://dblp.org/pid/152/4133>