Which author named C. published the paper on Materials management?
Which author published the paper on Materials management and has the name David?
SELECT DISTINCT ?answer WHERE { <https://dblp.org/rec/conf/ACMse/Nowading79> <https://dblp.org/rdf/schema#authoredBy> ?answer }
<https://dblp.org/rec/conf/ACMse/Nowading79>