https://qualifications.pearson.com/content/dam/pdf/A%20Level/Music/2016/teaching-and-learning-materials/A_level_Saariaho_Petals_set_work_support_guide.pdf|titre=Analyse de Petals (fr)
http://www.paoloaralla.it/CLASSE-MATERIALI-DIDATTICI/PARTITURE/VARIE-900/SAARIAHO%20-%20Petals.PDF|titre=Partition de Petals (fr)