Øystein Sørensen
... that in addition to his academic work, Norwegian history professor Øystein Sørensen is considered an expert on the Donald Duck universe?
... that in addition to his academic work, <a href="./Norway" id="mwGsY" rel="mw:WikiLink" title="Norway">Norwegian</a> <a href="./History" id="mwGsc" rel="mw:WikiLink" title="History">history</a> <a href="./Professor" id="mwGsg" rel="mw:WikiLink" title="Professor">professor</a> <b id="mwGsk"><a href="./Øystein_Sørensen" id="mwGso" rel="mw:WikiLink" title="Øystein Sørensen">Øystein Sørensen</a></b> is considered an expert on the <a href="./Donald_Duck" id="mwGss" rel="mw:WikiLink" title="Donald Duck">Donald Duck universe</a>?