@article{article26770713,
title   = {Subsensitivity to beta-adrenoceptor agonists in pacemakers isolated from senescent rats},
author = {Spadari, R C and De Moraes, S},
year = {1991},
doi = {10.1016/0306-3623(91)90230-4},
journal   = {General Pharmacology}
}