@article{ref1,
title="To the third and the fourth generations",
journal="Southern medical journal",
year="1989",
author="Thomison, J. B.",
volume="82",
number="6",
pages="675-677",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0038-4348",
doi="",
url="http://dx.doi.org/"
}