Get Shared Query results using Plain Java

Hi,
I would like to extract "Shared Query" results using a Plain Java client but I can't find any tutorial or documentation explaining how to do that.

I already know the QueryDevGuide but there is nothing regarding this need.
The https://jazz.net/wiki/bin/view/Main/APIUsage#IQueryRestService_Modeled_REST page show the API without any sample.

Is there a page/post somewhere explaining how to search for work items using shared queries ?
Thanks a lot in advance !
Gael