Quadruple Roman Domination in Trees. - Zheng Kou; Saeed Kosari; Guoliang Hao; Jafar Amjadi; Nesa Khalili (Symmetry, 2021)

Quadruple Roman domination in graphs. - Jafar Amjadi; Nesa Khalili (Discret. Math. Algorithms Appl., 2022)

On [ k ] -Roman domination in graphs. - Nesa Khalili; Jafar Amjadi; Mustapha Chellali; Seyed Mahmoud Sheikholeslami (AKCE Int. J. Graphs Comb., 2023)

New results on quadruple Roman domination in graphs. - Jafar Amjadi; Nesa Khalili (Discret. Math. Algorithms Appl., 2023)