In which year were the first papers of the authors of 'Clustering of Software Systems Using New Hybrid Algorithms' published?
Mention the year in which the first papers of the authors of 'Clustering of Software Systems Using New Hybrid Algorithms' were published.
SELECT DISTINCT ?answer MIN(xsd:integer(?y)) AS ?y WHERE { <https://dblp.org/rec/conf/IEEEcit/MamaghaniM09> <https://dblp.org/rdf/schema#authoredBy> ?answer . ?x <https://dblp.org/rdf/schema#authoredBy> ?answer . ?x <https://dblp.org/rdf/schema#yearOfPublication> ?y }
<https://dblp.org/rec/conf/IEEEcit/MamaghaniM09>