The current issue (#80 Summer/Fall 2004) of the premier Bruce Springsteen fanzine 'Backstreets' - The Boss Magazine' has a special feature section of articles on the connections between Elvis and Bruce.
Articles detail Bruce's Elvis fanship, recordings by Bruce that reference Elvis, a detailed account of the night Bruce jumped the wall at Graceland, and more. Good stuff.
Backstreets Magazine
Also read;
Bruce Springsteen Talks and Sings about Elvis
The Night Springsteen Jumped the Fence at Graceland
Behind the Button: Elvis Presley's 'Cameo' on Born to Run
The Shock of Elvis by Paul Simpson
Music Video : Bruce Springsteen : Follow That Dream [Unreleased Studio version from 1983]
Music Video : Bruce Springsteen : Buring Love : Live August 2009