@article{ref1,
title="Effects of caffeine, ephedrine and their combinations on time to exhaustion during high-intensity exercise",
journal="European journal of applied physiology and occupational physiology",
year="1999",
author="Morton, R. H.",
volume="79",
number="4",
pages="379-381",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0301-5548",
doi="",
url="http://dx.doi.org/"
}