APA (7th ed.) Citation

He, T., Lu, Y., Lei, Y., & Yang, F. Nontrivial Periodic Solutions for Nonlinear Second-Order Difference Equations. Wiley.

Chicago Style (17th ed.) Citation

He, Tieshan, Yimin Lu, Youfa Lei, and Fengjian Yang. Nontrivial Periodic Solutions for Nonlinear Second-Order Difference Equations. Wiley.

MLA (9th ed.) Citation

He, Tieshan, et al. Nontrivial Periodic Solutions for Nonlinear Second-Order Difference Equations. Wiley.