APA (7th ed.) Citation

LLIBRE,JAUME, NOVAES,DOUGLAS D, & TEIXEIRA,MARCO A. (2015). Periodic solutions of Lienard differential equations via averaging theory of order two.

Chicago Style (17th ed.) Citation

LLIBRE,JAUME, NOVAES,DOUGLAS D, and TEIXEIRA,MARCO A. Periodic Solutions of Lienard Differential Equations via Averaging Theory of Order Two. 2015.

MLA (8th ed.) Citation

LLIBRE,JAUME, et al. Periodic Solutions of Lienard Differential Equations via Averaging Theory of Order Two. 2015.

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