Shadowed sets of type-II: Representing and computing shadowiness in shadowed sets. - Musa Adeku Ibrahim; Tamunokuro Opubo William-West (Int. J. Intell. Syst., 2018)

Shadowed sets with higher approximation regions. - Musa Adeku Ibrahim; Tamunokuro Opubo William-West; Armand Florentin Donfack Kana; D. Singh (Soft Comput., 2020)

On shadowed hypergraphs. - Tamunokuro Opubo William-West (Soft Comput., 2020)

A generalized cost-sensitive model for decision-theoretic three-way approximation of fuzzy sets. - Musa Adeku Ibrahim; Tamunokuro Opubo William-West (Inf. Sci., 2021)

Decision-theoretic five-way approximation of fuzzy sets. - Tamunokuro Opubo William-West; Davide Ciucci (Inf. Sci., 2021)

Shadowed-set-based three-way clustering methods: An investigation of new optimization-based principles. - Tamunokuro Opubo William-West; Armand Florentin Donfack Kana; Musa Adeku Ibrahim (Inf. Sci., 2022)

On shadowed set approximation methods. - Tamunokuro Opubo William-West; Musa Adeku Ibrahim (Soft Comput., 2023)

Trade-off principle for standard shadowed sets and its generalization to five-regions. - Tamunokuro Opubo William-West; Musa Adeku Ibrahim (Fuzzy Sets Syst., 2023)