Title BOUNDS ON THE GLOBAL DOUBLE ROMAN DOMINATION NUMBER IN GRAPHS Type of Research Article Keywords BOUNDS ON THE GLOBAL DOUBLE ROMAN DOMINATION NUMBER IN GRAPHS Abstract BOUNDS ON THE GLOBAL DOUBLE ROMAN DOMINATION NUMBER IN GRAPHS Researchers Guoliang Hao (First Researcher)، S. Wei (Second Researcher)، Seyed Mahmoud Sheikholeslami Kavkani (Third Researcher)، Guoning Chen (Fourth Researcher)