ENTESAR M. NASR; AMNA M. NASR; HEND M. ELGADI; AMIRA A. HASHEM; AMBARK A. ASHAT. Fractional Singular Coupled System: Existence Theory via Extended Leggett-Williams Theorem. Al-imad Journal of Humanities and Applied Sciences (AJHAS), Libya, v. 2, n. 1, p. 731–745, 2026. Disponível em: https://al-imadjournal.ly/index.php/ajhas/article/view/99. Acesso em: 11 may. 2026.