AUTOMORPHISMS AND DERIVATIONS IN TRAIN ALGEBRAS OF DEGREE 2 AND EXPONENT 4. Far East Journal of Mathematical Sciences (FJMS), [S. l.], v. 142, n. 4, p. 501–528, 2025. DOI: 10.17654/0972087125028. Disponível em: https://pphmjopenaccess.com/fejms/article/view/3063. Acesso em: 5 jan. 2026.