Chiu, K.-S. and Sepúlveda, I. B. (2025) “Infinitely many periodic solutions for differential equations involving piecewise alternately advanced and retarded argument”, Eurasian Mathematical Journal, 16(4), pp. 33–44. Available at: https://emj.enu.kz/index.php/main/article/view/875 (Accessed: 3 January 2026).