Psarra, Angelika; Fournaraki, Eleni (2006). "Parren, Callirhoe (doğum Siganou) (1859–1940)". de Haan, Francisca; Daskalova, Krassimira; Loutfi, Anna (Ed.). Biographical dictionary of women's movements and feminisms in Central, Eastern, and South Eastern Europe: 19th and 20th centuries. Budapeşte, Macaristan: Central European University Press. ss. 402-407. ISBN978-9-637-32639-4 – Project MUSE vasıtasıyla.