HARIYANTO, Susilo. The Solution Of Nonhomogen Abstract Cauchy Problem by Semigroup Theory of Linear Operator. Journal of Natural Sciences and Mathematics Research, [S. l.], v. 2, n. 2, p. 143–147, 2017. Disponível em: https://journal.walisongo.ac.id/index.php/JNSMR/article/view/1656. Acesso em: 7 jun. 2025.