Title maximal Roman domination in graphs Type of Research Article Keywords maximal Roman domination in graphs Abstract maximal Roman domination in graphs Researchers Hossein Abdollahzadeh Ahangar (First Researcher)، ali bahremad pour (Second Researcher)، Seyed Mahmoud Sheikholeslami Kavkani (Third Researcher)، N.D Sonar (Fourth Researcher)، Lutz Volkmann (Fifth Researcher)