Samuel E. CHUKWU, Martins Y. OTACHE, Precious O. ATEMOAGBO, and Emmanuel O. AGBESE, “Copula-Based Modelling of Drought Severity-Duration-Frequency Relationship of Sokoto-Rima-River Basin, Nigeria ”, FJET, vol. 1, no. 2, pp. 389–401, Sep. 2025, doi: 10.33003/jgvx8081.