Diffloth, G. 1968. The Irula Language, a Close Relative of Tamil. University of California, doctoral dissertation, Los Angeles

Zvelebil, Kamil. 1968. “Irula – A South Dravdivian Language.” New Orient Bimonthly 7: 94-95

Zvelebil, Kamil. 1971. “Irula Vowels.” Indo-Iranian Journal 13:113-122

Zvelebil, Kamil V. 1973. The Irula Language. Wiesbaden: Harrassowitz

Zvelebil, Kamil V. 1979. The Irula (ёrla) Language, Part 2. Wiesbaden: Harrassowitz

Zvelebil, Kamil V. 1979. "Irula riddles." Bulletin of the School of Oriental and African Studies XLII/2:361-368

Zvelebil, Kamil. 1982. The Irula (ёrla) Language, Part 3: Irula lore, texts and translations. Wiesbaden: Harrassowitz

Zvelebil, Kamil. 2004. "Prolegomena to an Etymological Dictionary to the Irula Language." Jean-Luc Chevillard & Eva Wilden (eds.), South Indian horizons: felicitation volume for François Gros on the occasion of his 70th birthday. with the collaboration of A. Murugaiyan, with a preface by R.E. Asher. Pondichéry: Institut Français de Pondichéry. 281-90. (Publications du Département d’Indologie, 94)