<para>The following lists of references may be helpful in learning about XML, Docbook, and/or Maven:</para>
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<para><citetitle>XML In a Nutshell</citetitle> by Elliotte Rusy Harold and W. Scott Means. Online at <linkxlink:href="http://docstore.mik.ua/orelly/xml/xmlnut/index.htm">http://docstore.mik.ua/orelly/xml/xmlnut/index.htm</link>.</para>
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<para><citetitle>DocBook 5: The Definitive Guide</citetitle> by Normal Walsh. Online at <linkxlink:href="https://www.safaribooksonline.com/library/view/docbook-5-the/9781449380243/">https://www.safaribooksonline.com/library/view/docbook-5-the/9781449380243/</link>.</para>
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<para><citetitle>DocBook XSL: The Complete Guide</citetitle> by Bob Stayton. Online at <linkxlink:href="http://www.sagehill.net/docbookxsl/">http://www.sagehill.net/docbookxsl/</link>.</para>
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<para><citetitle>Maven: The Complete Reference</citetitle> by Tim O'Brien, Manfred Moser, John Casey, Brian Fox, Jason Van Zyl, Eric Redmond, and Larry Shatzer. Online at <linkxlink:href="http://books.sonatype.com/mvnref-book/reference/index.html">http://books.sonatype.com/mvnref-book/reference/index.html</link>.</para>