Psarra, Angelika; Fournaraki, Eleni (). „Parren, Callirhoe (born Siganou) (1859–1940)”. În de Haan, Francisca; Daskalova, Krassimira; Loutfi, Anna. Biographical dictionary of women's movements and feminisms in Central, Eastern, and South Eastern Europe: 19th and 20th centuries. Budapest, Hungary: Central European University Press. pp. 402–407. ISBN978-9-637-32639-4.