@article{article, title = {{A parametric frequency response method for non-linear time-varying systems}}, url = {{}}, year = {{2013}}, month = {{1}}, author = {{Guo Y and Guo LZ and Billings SA and Coca D and Lang ZQ}}, doi = {{10.1080/00207721.2012.762563}}, journal = {{International Journal of Systems Science}}, note = {{Accessed on 2025/06/22}}}