RIESZ BASIS PROPERTY AND EXPONENTIAL STABILITY OF A SECOND ORDER SYSTEM IN TIME WITH VARIABLE COEFFICIENTS. Far East Journal of Dynamical Systems, [S. l.], v. 36, n. 1, p. 77–92, 2023. DOI: 10.17654/0972111823003. Disponível em: https://pphmjopenaccess.com/fejds/article/view/81. Acesso em: 5 jan. 2026.