Jock Hughes: The languages of Kei, Tanimbar and Aru: Lexicostatistic classification. W: Soenjono Dardjowidjojo (red.): Miscellaneous studies of Indonesian and other languages in Indonesia. Cz. 9. Jakarta: Badan Penyelenggara Seri Nusa, Universitas Atma Jaya, 1987, s. 71–111, seria: NUSA: Linguistic studies in Indonesian and languages in Indonesia 27. OCLC896429711. (ang.).
Jock Hughes: The languages of Kei, Tanimbar and Aru: Lexicostatistic classification. W: Soenjono Dardjowidjojo (red.): Miscellaneous studies of Indonesian and other languages in Indonesia. Cz. 9. Jakarta: Badan Penyelenggara Seri Nusa, Universitas Atma Jaya, 1987, s. 71–111, seria: NUSA: Linguistic studies in Indonesian and languages in Indonesia 27. OCLC896429711. (ang.).