G. Bekele, Mulugeta Tilahun Keno, Damena Edae Daba, H. Mengistu, T. Kinde, and G. Tadese, “Brewery sludge application rate and type influence maize (Zea mays L.) yield and soil chemical properties on acidic Nitisols of southwestern ”, STAR, vol. 15, no. 3, pp. 11–25, Sep. 2026.