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2. Padmanabha Kekunnaya, K.: A comparative study of Tulu dialects. https://cir.nii.ac.jp/crid/1130282273061170560
3. Männer, A.: Tulu-English dictionary. Basel Mission Press, Mangalore (1886). Google-Books-ID: FuAUAAAAYAAJ
4. Somashekar, S.: Developmental Trends in the Acquisition of Relative Clauses: Cross-linguistic Experimental Study of Tulu. Cornell University (1999)
5. Caldwell, R.: A Comparative Grammar of the Dravidian Or South-Indian Family of Languages. Trübner (1875). Google-Books-ID: rHUZAAAAIAAJ