@article{article3209,
  title = {Normal limits of ECG measurements related to atrial activity using a modified limb lead system},
  author = {Sivaraman, J. and Uma, G. and Venkatesan, S. and Umapathy, M. and Elumalai  Dhandapani, V.},
  journal = {The Anatolian Journal of Cardiology},
  year = {2015},
  volume = {15},
  pages = {2-6},
  doi = {10.5152/akd.2014.5155}
}