%0 Journal Article %T Threshold for Chaos of a Duffing Oscillator with Fractional-Order Derivative %A Xing, Wuce %A Chen, Enli %A Chang, Yujian %A Wang, Meiqi %J Shock and Vibration %V 2019 %@ 1070-9622 %D 2019-08-27 %I Hindawi %~ DeepDyve