TY - JOUR T1 - An investigation into the characteristics of non-linear frequency response functions. Part 1: Understanding the higher dimensional frequency spaces JO - INT J CONTROL PY - 2005/09/10 AU - Yue R AU - Billings SA AU - Lang ZQ ED - DO - DOI: 10.1080/00207170500144417 VL - 78 IS - 13 SP - 1031 EP - 1044 Y2 - 2024/12/22 ER -