Title On the Italian reinforcement number of a digraph Type of Research Article Keywords On the Italian reinforcement number of a digraph Abstract On the Italian reinforcement number of a digraph Researchers Zhihong Xie1 (First Researcher)، G. Hao (Second Researcher)، Seyed Mahmoud Sheikholeslami Kavkani (Third Researcher)، Shuting Zeng Shuting Zeng (Fourth Researcher)