Chachulska, Irina. “The Jemielnica Cistercians’ Gradual PL-WRu I F 418. New Findings and Hypotheses”. Muzyka 68, no. 1 (March 31, 2023): 3–19. Accessed August 31, 2026. https://czasopisma.ispan.pl/index.php/m/article/view/1682.