@article{ref1,
title="The Brazilian bee problem",
journal="Annual review of entomology",
year="1975",
author="Michener, C. D.",
volume="20",
number="",
pages="399-416",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0066-4170",
doi="10.1146/annurev.en.20.010175.002151",
url="http://dx.doi.org/10.1146/annurev.en.20.010175.002151"
}