1. Breaking paragraphs into lines;Knuth;Software-Practice and Experience,1981
2. Berglund A Extensible Stylesheet Language (XSL) version 1.1. W3C Recommendation http://www.w3.org/TR/xsl/
3. FOP: Formatting Objects Processor http://xmlgraphics.apache.org/fop/
4. Adobe InDesign CS4 http://www.adobe.com/products/indesign/