Dickey, Timothy J. 2005. Rethinking the Siena Choirbook: A New Date and Implications for its Musical Contents. Early Music History, 24: 1-52.

Dickey, Timothy J. 2003. Reading the Siena Choirbook: A Re-Appraisal of the Dating, Musical Repertoires, and Marian Performance Context of the Manuscript Siena, Biblioteca Comunale degli intronati, MS. K.1.2. Duke University, Ph.D.