APA citáció

Wang Weibing & Luo Yan. (2013). Periodic solutions for a class of second order differential equations.

Chicago Style (17th ed.) Citation

Wang Weibing and Luo Yan. Periodic Solutions for a Class of Second Order Differential Equations. 2013.

MLA idézés

Wang Weibing and Luo Yan. Periodic Solutions for a Class of Second Order Differential Equations. 2013.

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