Fox, Dan. Teach Yourself ADO.NET in 21 Days. Sams, 2002. ISBN 0-672-32386-9.
"Microsoft Patterns and Practices," at www.microsoft.com/resources/practices. Specifically, you should note the document titled "Application Architecture for .NET: Designing Applications and Services," at http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnbda/html/distapp.asp.
IEEE Wireless Standards Zone, at http://standards.ieee.org/wireless/overview.html.
Skonnard, Aaron. "Publishing and Discovering Web Services with DISCO and UDDI." MSDN Magazine (February 2002), at http://msdn.microsoft.com/msdnmag/issues/02/02/xml.