@article{articleec708022,
title   = {Autonomic nervous controls of the heart rate during isometric exercise in normal man},
author = {Maciel, B C and Gallo Junior, L and Marin Neto, J A and Martins, L E B},
year = {1987},
doi = {10.1007/bf00581348},
journal   = {Pfluegers Archiv European Journal of Physiology}
}