Evans (1998) briefly discusses vowels in his paper noting that Iwaidjan languages including Ilgar have a three vowel (/a/, /i/, /u/) system typical of most Australian languages.
↑Evans, Nicholas (1998). "Iwaidja mutation and its origins". In Anna Siewierska & Jae Jung Song. Case, Typology and Grammar: In honor of Barry J. Blake. Amsterdam/Philadelphia: John Benjamins Publishing Company. pp. 115–149.
↑Nicholas Evans, 2000. "Iwaidjan, a very un-Australian language family." In Linguistic Typology, 4:99-100.
Further reading
Evans, N. (2007). Pseudo-argument affixes in Iwaidja and Ilgar: a case of deponent subject and object agreement. In M. Baerman, G. G. Corbett, D. Brown, & A. Hippisley (Eds.), Deponency and morphological mismatches (pp.271–296). Oxford: Oxford University Press.
Evans, N. (1994). Ilgar Field Notes, Recorded from Charlie Wardaga.