<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0370-3908</journal-id>
<journal-title><![CDATA[Revista de la Academia Colombiana de Ciencias Exactas, Físicas y Naturales]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. acad. colomb. cienc. exact. fis. nat.]]></abbrev-journal-title>
<issn>0370-3908</issn>
<publisher>
<publisher-name><![CDATA[Academia Colombiana de Ciencias Exactas, Físicas y Naturales]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0370-39082018000400319</article-id>
<article-id pub-id-type="doi">10.18257/raccefyn.784</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[New universal 3-3-1 models]]></article-title>
<article-title xml:lang="es"><![CDATA[Nuevos modelos 3-3-1 universales]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ponce]]></surname>
<given-names><![CDATA[William A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Antioquia Instituto de Física ]]></institution>
<addr-line><![CDATA[Medellín ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2018</year>
</pub-date>
<volume>42</volume>
<numero>165</numero>
<fpage>319</fpage>
<lpage>322</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0370-39082018000400319&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0370-39082018000400319&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0370-39082018000400319&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract We review in a systematic way how anomaly free   SU(3)c &#8855; SU(3)L &#8855; U(1)X, models without exotic electric charges are constructed, using as basis closed sets of fermions which includes each one the particles and antiparticles of the electrically charged fields. Our analysis reproduce not only the known models in the literature, but also shows the existence of two new family independent ones not considered so far.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Se revisa de manera sistemática como se construyen los modelos sin cargas eléctricas exóticas basados en el grupo gauge local   SU(3)c &#8855; SU(3)L &#8855; U(1)X, usando como base conjuntos cerrados de fermiones los cuales incluyen las partículas y las antipartículas de los campos eléctricamente cargados. Nuestro análisis no solo reproduce los modelos presentes en la literatura, sino que muestra la existencia de dos modelos nuevos independientes de familias no estudiados a la fecha.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Gauge models]]></kwd>
<kwd lng="en"><![CDATA[Extensions to the standard model]]></kwd>
<kwd lng="en"><![CDATA[Gauge anomalies]]></kwd>
<kwd lng="es"><![CDATA[Modelos gauge]]></kwd>
<kwd lng="es"><![CDATA[Extensiones al modelo estándar]]></kwd>
<kwd lng="es"><![CDATA[Anomalías gauge]]></kwd>
</kwd-group>
</article-meta>
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