Are there any examples how to invoke a web service from a EJB3?

I want to use the @WebServiceRef annotation. I understand, that I need the service and the endpoint interface for using it. But where do I get these classes from.
I cannot use wsconsume because it genetrates classes with annotations like @WebService, that makes it unpossible to deploy without error.

So are there any examples, tutorials, or other documents that explain the invokation of web services from an EJB3?

Thanks Thorsten