Wegman 1991a Rob C. Wegman, ‘Petrus de Domarto's Missa Spiritus almus and the Early History of the Four-Voice Mass in the Fifteenth Century’, in Early Music History 10 (1991), 235–303.
Perz 1986 Miroslaw Perz, ‘The Lvov Fragments: A Source for Works by Dufay, Josquin, Petrus de Domarto, and Petrus de Grudencz in 15th-Century Poland’, in Tijdschrift van de Vereniging voor Nederlandse Muziekgeschiedenis 36 (1986), 26–51. esp. 34