↑ Mango, Andrew (2005). Turkey and the War on Terror: 'For Forty Years We Fought Alone'. Routledge: London. tr. 32. ISBN9780203687185. The most ruthless among them was Abdullah Öcalan, known as Apo (a diminutive for Abdullah; the word also means 'uncle' in Kurdish).
↑ Jongerden, Joost (2007). The Settlement Issue in Turkey and the Kurds: An Analysis of Spatical Policies, Modernity and War. Leiden, the Netherlands: Brill. tr. 57. ISBN9789004155572. In 1975 the group settled on a name, the Kurdistan Revolutionaries (Kurdistan Devrimcileri), but others knew them as Apocu, followers of Apo, the nickname of Abdullah Öcalan (apo is also Kurdish for uncle).
↑ Marlies Casier, Joost Jongerden, Nationalisms and Politics in Turkey: Political Islam, Kemalism and the Kurdish Issue, Taylor & Francis, 2010, p. 146.
↑ Council of Europe, Parliamentary Assembly Documents 1999 Ordinary Session (fourth part, September 1999), Volume VII, Council of Europe, 1999, p. 18
↑ Mag. Katharina Kirchmayer, The Case of the Isolation Regime of Abdullah Öcalan: A Violation of European Human Rights Law and Standards?, GRIN Verlag, 2010, p. 37
