PANDEY, R.; SHUKLA, C.; SHUKLA, A.; UPADHYAY, A.; SINGH, A. K. A new approach on approximate controllability of Sobolev-type Hilfer fractional differential equations. An International Journal of Optimization and Control: Theories & Applications (IJOCTA), [S. l.], v. 13, n. 1, p. 130–138, 2023. DOI: 10.11121/ijocta.2023.1256. Disponível em: http://ijocta.org/index.php/files/article/view/1256. Acesso em: 22 apr. 2025.