{"id":"000414015","type":"article","title":"Tribunician dates of the joint and separate reigns of Valerianus and Gallienus. A plea for the Auguste-September theory","pages":"215-223","container-title":"Zeitschrift für Papyrologie und Epigraphik, 67.1987","author":[{"family":"Armstrong","given":"D."}],"issued":{"raw":"1987"}}