Grove: a production-optimised foliage generator for "The Lord of the Rings: The Two Towers". - Matt Aitken; Martin Preston (GRAPHITE, 2003)

The Lord of the Rings: the visual effects that brought middle earth to the screen. - Matt Aitken; Greg Butler; Dan Lemmon; Eric Saindon; Dana Peters; Guy Williams (SIGGRAPH Course Notes, 2004)