CENTER MANIFOLD ANALYSIS OF A DELAYED MODEL WITH R&D SPILLOVERS. Far East Journal of Dynamical Systems, [S. l.], v. 34, p. 1–9, 2022. DOI: 10.17654/0972111822001. Disponível em: https://pphmjopenaccess.com/fejds/article/view/636. Acesso em: 5 jan. 2026.