Books
Pfaffenberger, Bryan
Web Publishing with XML in 6 Easy Steps
Academic Press, San diego USA, 1999
Powell, Thomas A
The Complete Reference HTML Second Edition
Osborne/McGraw-Hill, California USA, 1999
Liberty, Jesse and Kraley, Mike
XML Web Documentation from Scratch
Que (Macmillian), Indiana USA, 2000
Web sites
XML on Microsoft's site
Robin Cover's XML page
VML