Didn't Izabela Z\u00F3ltowska and Eugeniusz T. not co-author a paper?
Was a paper not not co-authored by Izabela Z\u00F3ltowska and Eugeniusz T.?
ASK { ?x <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/53/3065> . ?x <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/08/2019> }
<https://dblp.org/pid/53/3065> <https://dblp.org/pid/08/2019>