Blust, Robert. 1991. The Greater Central Philippine Hypothesis.
Oceanic Linguisics 30.2:73-129

Pages 77-78
2.1 BASHIIC. This is a close-knit, highly discrete, completely noncontroversial group which includes Yami of Botel Tobago Island (Taiwan), Itbayaten and Ivatan of the extreme northern Philippines. The name is adopted from Reid (p.c.), who derives it from the Bashi Channel between the Batanes Islands and Taiwan. Tsuchida et al. (1987) prefer the name "Batanic," and record several additional dialects.
TH62 and D65 consider only Ivatan, but the former recognize it as one of four coordinate branches of their Philippine Superstock, and the latter as one of 11 coordinate branches of his Philippine Hesion. All subsequent writers recognize Bashiic as a highly discrete group, although W79 and McF80 do not consider Yami. Z86 suggests that Bashiic may group with Sambalic, Kapampangan, and North Mangyan (Mindoro) as one of two primary branches of "Northern Philippines" (the member languages sharing the merger of PAN *R and *y), but McF80 rejects this view. The major source of lexical material is Yamada (1976) for Itbayaten, and Tsuchida et al. (1987) for the other languages.
ABBREVIATIONS:
D65 = Dyen (1965)
LM76 = Llamzon and Martin (1976)
McF80 = McFarland (1980)
R81 = Reid – personal communication from Reid cited in Zorc (1986)
R82 = Reid (1982)
TH62 = Thomas and Healey (1962)
W79 = Walton (1979)
Z74 = Zorc (1974)
Z77 = Zorc (1977)
Z86 = Zorc (1986)