| year of publication | ISBN | author(s) | title |
|---|---|---|---|
| 1999 | 978-0-9548498-0-1 | José Andres Sotorrío | Thumb-chord Technique for Guitar |
| 2007 | 978-0-9548498-1-8 | José A. Sotorrio | Thumb-Chord Technique for Guitar |
| '' | 978-0-9548498-2-5 | José A. Sotorrío | Bilinear Music Notation: A New Notation System for the Modern Musician |