TY - CONF T1 - Approximation of the Duffing oscillator frequency response function using the FPK equation JO - Journal of Physics: Conference Series PY - 2009/01/01 AU - Cross EJ AU - Worden K ED - DO - DOI: 10.1088/1742-6596/181/1/012085 VL - 181 IS - 1 Y2 - 2024/10/23 ER -