Guest, Simon, Microsoft .NET and J2EE Interoperability Toolkit, Microsoft Press, ISBN 0-7356-1922-0
For information about distributed enterprise application concepts, such as Presentation, Business, and Data tiers on .NET: Application Architecture for .NET: Designing Applications and Services
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnbda/html/distapp.asp
For the equivalent information about Java, see the Sun J2EE Web site: http://java.sun.com/j2ee/
For general information about XML Web services, see the following Web sites:
.NET XML Web Services Repertory, at http://www.xmlwebservices.cc/
Web Services Developer Home, at http://msdn.microsoft.com/webservices