@article{article676,
  title = {Free vibration analysis of helicoidal bars with thin- walled circular tube cross-section via mixed finite element method},
  author = {ERATLI, N. and ERMİŞ, M. and OMURTAG, M.H.},
  journal = {Sigma Journal of Engineering and Natural Sciences},
  year = {2015},
  volume = {33},
  pages = {200-218},
  doi = {}
}