How many research papers has Arthur H. M. van Roermund published?
How many papers has Arthur H. M. van Roermund published?
SELECT (COUNT(DISTINCT ?answer) AS ?count) WHERE { ?answer <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/66/2420> }
<https://dblp.org/pid/66/2420>