See also the home page of the Legenda book series Legenda (General Series)

Cobras e Son: Papers on the Text, Music and Manuscripts of the 'Cantigas de Santa Maria'
Edited by Stephen Parkinson
Legenda (General Series) 1 December 2000

Performing Medieval Text
Edited by Ardis Butterfield, Henry Hope and Pauline Souleau
Legenda (General Series) 1 November 2017