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Skyscraper Museum: World's Tallest Building: Burj Dubai (Burj Khalifa)
Archived exhibit, from 2007, of the Burj Khalifa (formerly known as the Burj Dubai) details the ambitious plans to erect the world's tallest building in the years before it was completed.
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Council on Tall Buildings and Urban Habitat: Burj Kahlifa (Burj Dubai) [Pdf]
In a paper by principal architect of the Burj Khalifa, Adrian Smith, he discusses the building's design, its development, and his approach to the work. [Note that Smith wrote and delivered this paper a year before the tower was completed.]