<ref xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:mml="http://www.w3.org/1998/Math/MathML" id="R1"><label>1</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>De Martino</surname><given-names>L</given-names></name><name><surname>Bruno</surname><given-names>M</given-names></name><name><surname>Formisano</surname><given-names>C</given-names></name><name><surname>De Feo</surname><given-names>V</given-names></name><name><surname>Napolitano</surname><given-names>F</given-names></name><name><surname>Rosselli</surname><given-names>S</given-names></name><name><surname>Senatore</surname><given-names>F</given-names></name></person-group><article-title>Chemical Composition and Antimicrobial Activity of the Essential Oils from Two Species of Thymus Growing Wild in Southern Italy</article-title><source>Molecules</source><year>2009</year><volume>14</volume><issue>11</issue><fpage>4614</fpage><lpage>4624</lpage><pub-id pub-id-type="pmid">19924089</pub-id></element-citation></ref>