Segun ken ni Paul Jen-kuei Li (2000),[2] ti Yami ket isu ti kaasitgan a kabagian ti Itbayat. Kadagiti sasao a Bataniko, ti Iraralay ket isu ti kakonsertibuan (Li 2000).
Ti sasao a Bataniko ket masansan a mainayon iti sasao nga Akin-amianan a Filipino. Nupay kasta, nabirukan ni Ross (2005) a saanda a maipakita a maikabagian iti ania man a naisangayan a sanga ti Malayo-Polinesio, ken isu a mabalin a mangbukel iti bukodda a kangrunaan a sanga.
^Malcolm Ross, 2005, "The Batanic Languages in Relation to the Early History of the Malayo-Polynesian Subgroup of Austronesian"[1]Naiyarkibo 2012-03-22 iti Wayback Machine
^Li, P.J.-K. 2000, "Subgrouping of the Batanic languages",[2] in The Fifth International Symposium on Languages and Linguistics, Hochiminh City, pp. 175-176. Vietnam National University, Ho Chi Minh City University of Social Sciences and Humanities.
Li, Paul Jen-kuei (2001). The Dispersal of the Formosan Aborigines in Taiwan. Language and Linguistics 2.1:271-278.
Moriguchi, Tsunekazu. 1983. "A preliminary report on Ivatan dialects". In ;;Batan Island and Northern Luzon: Archaeological, Ethnographical and Linguistic Survey;;, 205-253. Kumamoto: Kumamoto University.
Shirahihara, K., Y. Aoyagi, and M. Koomoto. 1983. Batan island and northern Luzon: Archaeological, ethnographical, and linguistic survey. Kumamoto: University of Kumamoto Press.