A. Einstein: The Italian Madrigal (Princeton, NJ, 1949/R)
Enciclopedia dello spettacolo
W. Apel: Geschichte der Orgel- und Klaviermusik bis 1700 (Kassel, 1967; Eng. trans., rev., 1972)
N. Pirrotta and E. Povoledo: Li due Orfei: da Poliziano a Monteverdi (Turin, 1969, enlarged 2/1975; Eng. trans., 1982, as Music and Theatre from Poliziano to Monteverdi)
Journal of the American Musicological Society
Nuova rivista musicale italiana
Musical Quarterly
Music Review
Vienna, St Peter, Musikarchiv
International Musical Society: Congress Report [II-IV, 1906-11]