@article{article7363276a,
title   = {Diurnal variation of the rat vas deferens contraction induced by stimulation of presynaptic nicotinic receptors and pineal function},
author = {Carneiro, R C G and Cipolla Neto, José and Markus, Regina P},
year = {1991},
journal   = {Journal of Pharmacology and Experimental Therapeutics}
}