The University of Newcastle, Australia published a paper on Vertex magic cover in what year?
When was the research paper on Vertex magic cover by The University of Newcastle published?
SELECT DISTINCT ?answer WHERE { <https://dblp.org/rec/journals/mics/SugengR11> <https://dblp.org/rdf/schema#authoredBy> ?x . ?x <https://dblp.org/rdf/schema#primaryAffiliation> 'The University of Newcastle, Australia' . <https://dblp.org/rec/journals/mics/SugengR11> <https://dblp.org/rdf/schema#yearOfPublication> ?answer }
<https://dblp.org/rec/journals/mics/SugengR11>