Cita APA (7a ed.)

Ruan, J. (2025). Periodic solutions of a class of second-order non-autonomous differential equations.

Cita Chicago Style (17a ed.)

Ruan, Jia. Periodic Solutions of a Class of Second-order Non-autonomous Differential Equations. 2025.

Cita MLA (9a ed.)

Ruan, Jia. Periodic Solutions of a Class of Second-order Non-autonomous Differential Equations. 2025.