- William A. Sethares. Tuning, Timbre, Spectrum, Scale - Why we divide octave into 12 equal parts, how is it related to string harmonics and how to create artificial timbres that make music in other tunings more consonant. With audio examples
- Easley Blackwood. Microtonal Compositions. He also published an article "Blackwood, E. (1991). Modes and Chord Progressions in Equal Tunings"
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https://learningmusic.ableton.com/advanced-topics/19-tone.html
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[Andrew M. Blake. COMPUTATIONAL ANALYSIS OF QUARTER-TONE COMPOSITIONS BY CHARLES IVES AND IVAN WYSCHNEGRADSKY]