Unequal Temperaments links
Barbieri, Patrizio - Publications on Historical Temperaments and Enharmonic Keyboards
Di Veroli, Claudio - “Unequal Temperaments: Revisited” in the Viola da Gamba Society Journal
Florida State University College of Music, Piano Technology Program
Ortgies, Ibo - “Temperaments around Froberger” in HPSCHD-L
Sturm, Fred - “Unequal Temperaments, 3rd edition” in the Piano Technicians Guild webpage
The Jackrail - A place for those interested in harpsichord and early stringed keyboard instruments