Title Outer independent double Roman domi- nation in unicyclic and bicyclic graphs Type of Research Article Keywords Outer independent double Roman domi- nation in unicyclic and bicyclic graphs Abstract Outer independent double Roman domi- nation in unicyclic and bicyclic graphs Researchers Sakineh Nazari-Mogaddam (First Researcher)، Mustapha Chellali (Second Researcher)، Seyed Mahmoud Sheikholeslami Kavkani (Third Researcher)