@article{Graff:2013,
author
=
"G.Graff and B.Graff and A.Kaczkowska and D.Makowiec and J.Amigó and J.Piskorski and K.Narkiewicz and P.Guzik",
title
=
"Ordinal pattern statistics for the assessment of heart rate variability",
journal
=
"European Physical Journal: Special Topics",
volume
=
"Vol. 222",
number
=
"no. 2",
pages
=
"525--534",
year
=
"2013",
}