<ref xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:mml="http://www.w3.org/1998/Math/MathML" id="R13"><label>13</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>De Lisi</surname><given-names>A</given-names></name><name><surname>Tedone</surname><given-names>L</given-names></name><name><surname>Montesano</surname><given-names>V</given-names></name><name><surname>Sarli</surname><given-names>G</given-names></name><name><surname>Negro</surname><given-names>D</given-names></name></person-group><article-title>Chemical characterisation of Thymus populations belonging from Southern Italy</article-title><source>Food Chemistry</source><year>2011</year><volume>125</volume><issue>4</issue><fpage>1284</fpage><lpage>1286</lpage></element-citation></ref>