Joseph Eska, a professor in the Department of English, published “Grounding Celtic Diachronic Phonology i. 1. *[x] > /j/ / _th in Proto-Brittonic. 2. */j/ > /ð/ / ˈ{e i}._V in Proto-Brittonic,” Die Sprache 53 (2018–2019 [2020]): 17–32.