@article{article2aae7bc2,
title   = {Heart rate variability in athletes and nonathletes at rest and during head-up tilt},
author = {Martinelli, F. S. and Chacon-Mikahil, Mara Patrícia Traina and Martins, L E B and Lima Filho, E C and Golfetti, R and Paschoal, M A and Gallo Júnior, Lourenço},
year = {2005},
doi = {10.1590/s0100-879x2005000400019},
journal   = {Brazilian Journal of Medical and Biological Research}
}