Who are the co-authors of Spiros Fotopoulos?
With which other authors has the author S. Fotopoulos written papers?
SELECT DISTINCT ?answer WHERE { ?x <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/88/4176> . ?x <https://dblp.org/rdf/schema#authoredBy> ?answer FILTER(?answer != <https://dblp.org/pid/88/4176>) }
<https://dblp.org/pid/88/4176>