APA (7th ed.) Citation

Zhang, G., & Cheng, S. S. Positive periodic solutions of nonautonomous functional differential equations depending on a parameter. Wiley.

Chicago Style (17th ed.) Citation

Zhang, Guang, and Sui Sun Cheng. Positive Periodic Solutions of Nonautonomous Functional Differential Equations Depending on a Parameter. Wiley.

MLA (9th ed.) Citation

Zhang, Guang, and Sui Sun Cheng. Positive Periodic Solutions of Nonautonomous Functional Differential Equations Depending on a Parameter. Wiley.

Warning: These citations may not always be 100% accurate.