Who are the authors that published papers about Barrier source in iSES in 2019?
In 2019 in iSES, who are the authors that published papers about Barrier source?
SELECT DISTINCT ?answer WHERE { <https://dblp.org/rec/conf/ises/KumarST19> <https://dblp.org/rdf/schema#authoredBy> ?answer . <https://dblp.org/rec/conf/ises/KumarST19> <https://dblp.org/rdf/schema#publishedIn> 'iSES' . <https://dblp.org/rec/conf/ises/KumarST19> <https://dblp.org/rdf/schema#yearOfPublication> '2019' }
<https://dblp.org/rec/conf/ises/KumarST19>