Michael Blow Vinayak R. Borkar Michael J. Carey Daniel Engovatov Dmitry Lychagin Panagiotis Reveliotis Joshua Spiegel Till Westmann Experiences with XQuery Processing for Data and Service Federation. 49-56 2008 31 IEEE Data Eng. Bull. 4 http://sites.computer.org/debull/A08dec/bea.pdf db/journals/debu/debu31.html#BlowBCELRSW08