@article{Sacha2015d,
title = {How to strengthen or weaken the HRV dependence on heart rate - description of the method and its perspectives.},
journal = {Int. J. Card.},
author = {J. Sacha and S. Barabach and G. Stankiewicz-Barabach and K. Sacha and A. Muller and J. Piskorski and P. Barthel and G. Schmidt},
volume = {168},
year = {2013},
pages = {1660}
}