Innsbruck: Institut für Sprachen und Literaturen der Universität Innsbruck, 2007. — 128 p. — (Innsbrucker Beiträge zur Sprachwissenschaft 127). — ISBN: 9783851247114.
1. Loss of PIE *p in Celtic and Related Matters, 2. A Rule of Laryngeals in Celtic, 3. A Relative Chronology of Sound Change from Proto-Indo-European to Celtic, 4. The Origins of Celtic, 5. The Rule of Palatalisation in Proto-Irish)