@article{article2027,
  title = {ANALYSING NONLINEAR SYSTEMS IN THE FREQUENCY DOMAIN USING GENERALISED DESCRIBING FUNCTION SERIES METHOD},
  author = {ÇANKAYA, Ä. and JONES, J.C.P. and VATANSEVER, F.},
  journal = {Sigma Journal of Engineering and Natural Sciences},
  year = {2003},
  volume = {21},
  pages = {-},
  doi = {}
}