1. Ariza, Christopher , 2000: Stravinsky's Verticals as Set-Class Similarity Contours, http://www.flexatone.net/docs/svSCsc.pdf (accessed June 20, 2005).
2. Ideas of Order in Motivic Music;Benjamin;Music Theory Spectrum,1979
3. Vector Products and Intervallic Weighting;Block;Journal of Music Theory,1994