Bezecny, Emil, Walter Rabl, Anton von Webern, and Louise Cuyler (editors). 1950. Heinrich Isaac. Choralis Constantinus [Nürnberg, 1550-1555] . Vol. 1 Denkmäler der Tonkunst in Österreich 5/1 vol. 10; vol. 2 DTÖ 16/1, vol 32; Vol. 3 University of Michigan Publications, Fine Arts, 2. 3 vols. Vol. 1 Vienna 1898; Vol. 2 Vienna and Leipzig 1909, Vol. 3 Ann Arbor.