@article{ref1,
title="The mycorrhiza helper bacteria revisited",
journal="New phytologist, The",
year="2007",
author="Frey‐Klett, P. and Garbaye, J. and Tarkka, M.",
volume="176",
number="1",
pages="22-36",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0028-646X",
doi="10.1111/j.1469-8137.2007.02191.x",
url="http://dx.doi.org/10.1111/j.1469-8137.2007.02191.x"
}