Was a paper not not co-authored by Zwieback, S. and Marina Leibman?
Didn't Zwieback, S. and Marina L. not co-author a paper?
ASK { ?x <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/117/7182> . ?x <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/210/0174> }
<https://dblp.org/pid/117/7182> <https://dblp.org/pid/210/0174>