Saka-Balogun, O. ., F. Oyelami, A. Y. Akinyele, and J. . . Omosowon. “Results of Semigroup of Linear Operators Generating a General Class of Semilinear Initial Value Problems”. European Journal of Pure and Applied Mathematics, vol. 16, no. 1, Jan. 2023, pp. 538-47, doi:10.29020/nybg.ejpam.v16i1.4659.