Recovering initial condition backward problem for composite fractional relaxation equations. Letters on Applied and Pure Mathematics, [S. l.], v. 3, n. 1, p. 1–10, 2025. DOI: 10.1234/4v45f027. Disponível em: https://lapmjournal.com/index.php/lapm/article/view/lapm.20253124. Acesso em: 4 apr. 2025.