Cox & Warner 2004, p. 301 (in "Thankless Attempts at a Definition of Minimalism" by Kyle Gann): "Certainly many of the most famous minimalist pieces relied on a motorick 8th-note beat, although there were also several composers like Young and Niblock interested in drones with no beat at all. ... Perhaps “steady-beat-minimalism” is a criterion that could divide the minimalist repertoire into two mutually exclusive bodies of music, pulse-based music versus drone-based music.Steve Reich is thought of as the godfather of minimalism"