Inc, Merriam-Webster (1995). Merriam-Webster's Encyclopedia of Literature. Merriam-Webster. tr. 74. ISBN9780877790426.
Indogermanica et Caucasica: Festschrift fur Karl Horst Schmidt zum 65. Geburtstag (Studies in Indo-European language and culture), W. de Gruyter, 1994, Etyma Graeca, tr. 213–214, trên Google books; Houwink ten Cate, The Luwian Population Groups of Lycia and Cilicia Aspera during the Hellenistic Period (Leiden) 1961:166, noted in this context by Brown 2004:252.