CHENG, Z; LV , L; LIU, J. INVESTIGATING POSITIVE PERIODIC SOLUTIONS IN SUPERLINEAR FIRST-ORDER DIFFERENTIAL SYSTEMS THROUGH GLOBAL BIFURCATION THEORY. International Journal of Interdisciplinary Research in Statistics, Mathematics and Engineering (IJIRSME), [S. l.], v. 9, n. 2, p. 13–22, 2023. Disponível em: https://sadijournals.org/index.php/IJIRSME/article/view/170. Acesso em: 14 mar. 2025.