This presentation: http://www.ibiblio.org/xml/slides/sd2001east/xmlandjava/
Elliotte Rusty Harold and Scott Means
O'Reilly & Associates, 2001
ISBN: 0-596-00058-8
DOM Level 2 Core Specification: http://www.w3.org/TR/DOM-Level-2-Core/
DOM Level 2 Traversal and Range Specification: http://www.w3.org/TR/DOM-Level-2-Traversal-Range/