Title Outer-independent k-rainbow domination Type of Research Article Keywords Outer-independent k-rainbow domination Abstract Outer-independent k-rainbow domination Researchers Qiong Kang (First Researcher)، Velademir Samodivkin (Second Researcher)، Zehui Shao (Third Researcher)، Seyed Mahmoud Sheikholeslami Kavkani (Fourth Researcher)، (Fifth Researcher)