Mention the number of papers that Arne D. Ekstrom has published.
How many research papers has Arne D. Ekstrom published?
SELECT (COUNT(DISTINCT ?answer) AS ?count) WHERE { ?answer <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/70/8259> }
<https://dblp.org/pid/70/8259>