The Tres in Cuba and Puerto Rico
- Article covering the origins and development of the tres, and of music associated with it; includes sound clips.
- http://www.cuatro-pr.org/Home/Eng/Instrmus/Instrmnts/Otherinst/tres.htm

A Little-known Fretted Instrument :: The Tres
- A historical account of the development of the instrument; includes details of tuning and discography.
- http://www.cumpiano.com/Home/Articles/Special%20interest/tres.html

Cuban Tres
- An educational site dedicated to the cuban tres. Includes history, players, recordings, and description of the instrument.
- http://www.concentric.net/~Scushman/