@article{article3275,
  title = {The acute effect of bi-level positive airway pressure on heart rate variability in chronic obstructive pulmonary disease patients with hypercapnic respiratory failure},
  author = {Yazıcı, M. and Uzun, K. and Ülgen, M.S. and Teke, T. and Maden, E. and Kayrak, M. and Turan, Y. and Arı, H.},
  journal = {The Anatolian Journal of Cardiology},
  year = {2008},
  volume = {8},
  pages = {426-430},
  doi = {}
}