<ref xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:mml="http://www.w3.org/1998/Math/MathML" id="R16"><label>16</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Nascimento</surname><given-names>GGF</given-names></name><name><surname>Locatelli</surname><given-names>J</given-names></name><name><surname>Freitas</surname><given-names>PC</given-names></name><name><surname>Silva</surname><given-names>GL</given-names></name></person-group><article-title>Antibacterial activity of plant extracts and phytochemicals on antibiotic-resistant bacteria</article-title><source>Brazilian Journal of Microbiology</source><year>2000</year><volume>31</volume><issue>4</issue><fpage>247</fpage><lpage>256</lpage></element-citation></ref>