Terhardt, E. (2006). Die psychoakustischen Grundlagen von Tonverwandtschaft und Harmonie. DAGA'06, Braunschweig CD-ROM (Deutsche Gesellschaft für Akustik)

Contents (transl. from German):

Introduction
Definition of tone affinity
Definition of harmony
Definition of pitch
The tones of music
Oscillation frequency and tone pattern of harmonic complex tones
Tone pattern and tone affinity according to Helmholtz
The complete tone pattern of harmonic complex tones
Explanation of tone affinity
Explanation of harmony
References