@article{Guzik:2010,
author
=
"P.Guzik and J.Piskorski and T.Krauze and A.Wykrętowicz and H.Wysocki",
title
=
"Partitioning total heart rate variability",
journal
=
"International Journal of Cardiology",
volume
=
"Vol. 144",
number
=
"no. 1",
pages
=
"138--139",
year
=
"2010",
note
=
"[Letter to the Editor]",
}