@article{ref1,
title="Daily variation in the concentration of melatonin and 5-methoxytryptophol in the human pineal gland: Effect of age and Alzheimer's disease",
journal="Brain research",
year="1990",
author="Skene, D. J. and Vivien-Roels, B. and Sparks, D. L. and Hunsaker, J. C. and Pévet, P. and Ravid, D. and Swaab, D. F.",
volume="528",
number="1",
pages="170-174",
abstract="<p>[Abstract unavailable]</p>",
language="en",
issn="0006-8993",
doi="10.1016/0006-8993(90)90214-V",
url="http://dx.doi.org/10.1016/0006-8993(90)90214-V"
}