How many different affiliations do the authors of 'Retrofitting FSO Systems in Existing RF Infrastructure: A Non-Zero-Sum Game Technology' have?
Count the different affiliations of the authors of 'Retrofitting FSO Systems in Existing RF Infrastructure: A Non-Zero-Sum Game Technology'.
SELECT (COUNT(DISTINCT ?answer) AS ?count) WHERE { <https://dblp.org/rec/journals/ojcs/TrichiliRBEAAOA21> <https://dblp.org/rdf/schema#authoredBy> ?x . ?x <https://dblp.org/rdf/schema#primaryAffiliation> ?answer }
<https://dblp.org/rec/journals/ojcs/TrichiliRBEAAOA21>