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Outer independent signed double Roman domination
Journal of Applied Mathematics and Computing, 2021Suppose $$[3]=\{0,1,2,3\}$$ and $$[3^{-}]=\{-1,1,2,3\}$$ . An outer independent signed double Roman dominating function (OISDRDF) of a graph
Mustapha Chellali, S M Sheikholeslami
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