Theoretical discussions of harmonic function and of neo-Riemannian voice-leading transformations have centered on triadic relationships. Transformational models for seventh chords have been proposed, ...

I. C. DRĂGHICESCU, ON THE TRANSFORMATION OF THE FIRST ORDER QUASILINEAR EQUATIONS BY A CHANGE OF VARIABLES AND FUNCTION, Bulletin mathématique de la Société des Sciences Mathématiques de la République ...