Oracle Service Bus 11g Development Cookbook
This book is full of immediately useable recipes showing you how to develop service and message-oriented (integration) applications on the Oracle Service Bus.
Handbuch für die Administration der Oracle Database 11g R2
Service agents in SOA are thin components put in front of a service. Creating service agents using WCF is actually quite easy making use of the WCF Routing Services and its underlying techniques. The code sample attached to this post demonstrates the implementation of a service agent to take care of authorizing service consumers prior forwarding requests to the actual service.