Killikelly, Clare, Mariia Merzhvynska, Ningning Zhou, Eva-Maria Stelzer, Philip Hyland, Jose Rocha, Menachem Ben-Ezra, and Andreas Maercker. “Examination of the New ICD-11 Prolonged Grief Disorder Guidelines Across Five International Samples”. Clinical Psychology in Europe 3, no. 1 (March 10, 2021): 1-16. Accessed December 1, 2021. https://cpe.psychopen.eu/index.php/cpe/article/view/4159.